Philadelphia City Directory 1870
Henry J. Toudy (H. J. Toudy & Co.) house 1806 Mervine
William Toudy (H. J. Toudy & Co.) house N 9th c York
H. J. Toudy & Co. lithographers, 505 Chestnut

Philadelphia City Directory 1873
Henry J. Toudy (H. J. Toudy & Co.) home 1806 Mervine
H. J. Toudy & Co. (Henry J. Toudy & William C. Merillat), practical lithographers & printers 529 Chestnut
[The line above is in large bold letters. ie an advertisement]

In the 1880 US Census 3rd Ward Shamokin Borough, Northumberland county, Pennsylvania
Henry J. Toudy, age 44, married, coal operator, born Pennsylvania, parents born Pennsylvania
Wife Alida J. Toudy, age 33, keeping house, born Pennsylvania [??], parents born Pennsylvania
Daughter Marian Toudy, age 8, born Pennsylvania, parents born Pennsylvania
Son Henry Toudy, age 5, born Pennsylvania, parents born Pennsylvania

Philadelphia City Directory 1889
Henry J. Toudy , publisher, 329 Walnut, house Morris c Manheim Gtn

Philadelphia City Directory 1890
Henry J. Toudy (H. J. Toudy & Co.) house 1806 Mervine
William Toudy (H. J. Toudy & Co.)house N 9th c York
H. J. Toudy & Co. lithographers, 505 Chestnut

1890 Veterans Schedules, surviving soldiers
Germantown, Philadelphia, Pennsylvania
Henry J. Toudy, rank U.R., company Rol, the rest of information is not listed
findagrave.com
Lieutenant Henry James Toudy
born Pittsburgh, Allegheny county, Pennsylvania
died October 23 1899, Philadelphia, Pennsylvania
buried West Laurel Hill Cemetery, Bala Cynwyd, Montgomery Pennsylvania

Pennsylvania Death Certificates
Henry J Toudy
Birth Date abt 1836
Birth Place PA
Death Date 23 Oct 1899
Death Place Philadelphia, Philadelphia, Pennsylvania
Age at Death 63
Burial Date 25 Oct 1899
Gender Male
Race White
Street Address 2149 Natrona
Cemetery W Laurel Hill
Marital Status Married

Civil War Veterans’ Cards Files
Henry J. Toudy, Anderson Troop
Enrolled October 30 1861 at Pittsburgh, Pennsylvania
Mustered in October 11 1861 as Private at Carlisle, Pennsylvania
Mustered Out March 26 1863
Age at enrolment 25, Complexion Fair
Height 5 feet 10 inches, Eyes Grey
Hair Sandy, Occupation Lithographer
Born Allegheny County, Pennsylvania
Promoted to Sergeant January 3 1863
[About 16 months service]

Pennsylvania, Veterans Burial Cards
Henry J. Toudy #5510
Army Veteran, Civil War
Dates of Service November 22 1864 to June 17 1865
Company K 70th Regiment 6th Pennsylvania Cavalry
Company K 2nd Provisional Cavalry
Rank 1st Lieutenant
Buried West Laurel Hill Cemetery, Pencoyd, Pennsylvania section Montgomery, lot 228, marble headstone
[About 7 months service or about 23 months service. The War lasted about 49 months, April 12, 1861 to May 26, 1865. So he joined the army a few months after the war started as a private, mustered out as a private and later rejoined as an officer and served until a month after the war ended.]

See Wikipedia: https://en.wikipedia.org/wiki/6th_Pennsylvania_Cavalry_Regiment
From Wikipedia:
In September, [1864] the regiment's original enlistments expired, and the unit was reorganized for an additional three years. Following the Appomattox Campaign, it was ordered to Washington, D.C., where it was consolidated with the 1st Pennsylvania Cavalry and 17th Pennsylvania Cavalry to form the 2nd Pennsylvania Provisional Cavalry. The combined regiment was sent to Louisville, Kentucky, where it was mustered out on August 7, 1865.
From a Wikipedia article on 1st Pennsylvania Cavalry Regiment to which they were consolidated.
Stony Creek Station December 1 [1864]
Hicksford Raid December 7–12.
Bellefield December 9–10.
Dabney's Mills, Hatcher's Run, February 5–7, 1865.
Appomattox Campaign March 28-April 9.
Dinwiddie Court House March 30–31.
Five Forks April 1.
Amelia Springs April 5.
Sailor's Creek April 6.
Farmville April 7.
Appomattox Court House April 9.
Surrender of Lee and his army.
Expedition to Danville April 23–29. Moved to Washington, D.C.. Grand Review of the Armies May 23.


From The Library Company of Philadelphia: https://digital.librarycompany.org/islandora/object/digitool%3A79232/print
Title H. J. Toudy & Co.
Date fl. 1865-1878
Description
H. J. Toudy & Co., established by partners Henry J. Toudy and William Toudy at 503-505 Chestnut Street, specialized in maps, atlases, and city view prints, and operated 1865-1878. Relocating to 525 Chestnut Street in 1872, the studio merged with the printing firm of George W. Ward & Company (formerly at 52 North Sixth Street). The new company of Henry J. Toudy, George W. Ward and William C. Merillat lasted less than two years with Ward leaving in 1872 and Merillat in 1873. Despite William Toudy's continual affiliation with the firm during this time, Henry J. Toudy became the sole proprietor, and as of 1875, his firm had a reported worth of $10,000.

Although the firm executed "very fine specimens of work in all departments of the art," atlases, maps, and city views preponderate the noted works of the company. Toudy & Co. worked on several Stone & Stewart county atlases in 1866, numerous county atlases published between 1873 and 1877, and many of the "General Surveys" of industrial plants throughout the Mid-Atlantic region produced by Ernest Hexamer during the 1870s. The firm also produced a number of respected views of cities, including one of the earliest depictions of Salt Lake City (1867), 13 full-color city view prints for "The Centennial Book of the Signers" (1872), and one of the first bird's-eye views produced by T. M. Fowler - Trenton, N.J. (1874).

During the 1870s, the firm relocated first to 623 Commerce Street in 1875 and later into the Ziegler & Smith building at Fourth and Cherry Streets in 1877. The decade also saw the firm triumph over Breuker & Kessler in a copyright infringement case over a print based on a drawing by Hermann J. Schwarzmann, architect of the Centennial Exhibition of 1876 grounds. Titled "Bird's Eye View of Centennial Buildings, Fairmount Park, Philadelphia, Pa. 1876," the view copyrighted by Toudy & Co. in March 1875 was one of a number of the Centennial produced by the company for which they are favorably known.

In spite of this legal success, a blow of another sort struck the company in a few years. On March 25, 1878, a devastating fire destroyed the six-story Ziegler & Smith building as well as several adjacent blocks of structures. H. J. Toudy & Company suffered a complete loss, and as a consequence, went out of business, only having a reported $21,000 worth of insurance.
End of quote

And also
Title Toudy, Henry J.
Alternate title H. J. Toudy & Co.
Date ca. 1837 - October 23, 1899
Description
Henry J[ulius] Toudy, born about 1837 in Pennsylvania, worked as a lithographer in Richmond, Virginia by 1860 before establishing the firm H. J. Toudy & Company in Philadelphia following the Civil War. After a devastating fire in 1878 causing the termination of his company, Toudy moved to Shamokin, Pennsylvania where he worked as a coal operator. He returned to Philadelphia about 1884, first working as a coal agent and then switching to publishing from 1886 until 1891. He retired that year when he obtained an invalid pension for his Civil War service in the Pennsylvania Calvary, including the rank of Lieutenant in Rush's Lancers (1864). Toudy died while a resident of 2149 Narona Street on October 23, 1899 in Philadelphia. He was buried at West Laurel Hill Cemetery. Toudy was married to Alida (b. ca. 1842) with whom he had two children Marian (b. ca. 1872) and Henry (b. ca. 1875).
[Actually 4 children.]

In the 1870 US census Philadelphia, Pennsylvania
H. J. Toudy, age 33, married, engraver, born Pennsylvania
Aleda Toudy, age 28, married, keeping house, keeping house, born New York
H. J. Toudy Junior, age 3 months, at home, born Pennsylvania

In the 1880 US Census 3rd Ward Shamokin Borough, Northumberland county, Pennsylvania
Henry J. Toudy, age 44, married, coal operator, born Pennsylvania, parents born Pennsylvania
Wife Alida J. Toudy, age 33, keeping house, born Pennsylvania [??], parents born Pennsylvania
Daughter Marian Toudy, age 8, born Pennsylvania, parents born Pennsylvania
Son Henry Toudy, age 5, born Pennsylvania, parents born Pennsylvania

In the 1900 US census 1368 South 46 Street, Philadelphia, Pennsylvania
Head Alida J. Toudy, born October 1841 New York state, age 58, widow, mother of 4 children - 3 still living, father born in Massachutsetts, mother born in New York state.
Daughter Marion Toudy, born February 1871 in Pennsylvania, age 29, single, father born in Pennsylvania, mother born in New York state
Son Henry F. Toudy, born November 1874 in Pennsylvania, age 25, single, father born in Pennsylvania, mother born in New York state, motorman railway
Son Albert J. Toudy, born January 1885 in Pennsylvania, age 15, single, father born in Pennsylvania, mother born in New York state, messenger fireman?

In the 1910 US census Burr Oak school district, Emmons county, North Dakota
Head Albert J. Toudy, age 25, single, born Pennsylvania, father born Pennsylvania, mother born New York state, occupation farmer, nature of industry general farm
Mother Alida J. Toudy, age 68 widow, born New York state, father born Massachusetts, mother born New York state, no occupation

US Find a grave index
Alida Jane Toudy, born October 1841,
died November 24 1911, Norristown, Montgomery county, Pennsylvania
Buried West Laurel Cemetery, Bala Cynwyd, Montgomery, Pennsylvania
Spouse Henry Julius Toudy 1836-1899
Children Marion T. Black born 1871, Albert James Toudy 1885 - 1983