It appears his original name was James Scotson. His age was almost one year older than their son Samuel Bagnall who died age less than one year. It seems possible he was a nephew of Mary Ellen. If so he would be an adopted 1st cousin 2 times removed to me.

In the 1901 census 13 Cawdor Street, Hulme, Lancashire.
Head Levi Bagnall, age 35, cloth warehouseman, born Manchester.
Wife Mary E. Bagnall, age 34, born Manchester.
Adopted son James Scotson, age 3, born Manchester.
Visitor Ada Swann, single, age 27, born South Australia.

In the 1911 census 7 The Drive, Walton Le Dale Near Preston, Preston, Lancashire.
Head Levi Bagnall, age 45, cotton cloth maker up, shipping warehouse, worker, born Manchester.
Wife Mary Ellen Bagnall, age 44, married 20 years, 3 children born alive all have died, born Hulme,
Manchester.
Nephew James Scotson, age 13, born Hulme, Manchester. [Note James was listed as an adopted son in the 1901 census.]

In the 1921 census The Square, Walton le Dale, Preston, Lancashire
Head Levi Bagnall, age 53 years 7 months, born Manchester, Lancashire, cloth maker-up - E. Spinner & Co., Higher Watson near Preston
Wife Mary Ellen Bagnall, age 54 years 11 months, born Hulme, Manchester, Lancashire, house wife
Son Samuel Bagnall, age 23 years 5 months, single, born Hulme, Manchester, Lancashire, iron moulder - J. Dewhurst & Sons, Moore Brook Foundry, Aqueduct St. Preston

Parish Records St. Mary, Preston, Lancashire
Marriage June 5 1924
Samuel Bagnall, age 26, bachelor, weaver, residence 156 London Road, father Levi Bagball, cloth maker and
Victoria Mary Brown, age 27, spinster, residence 11 Ashleigh St.?, father John Henry Brown, cloth looser?
After Banns by John? I? H Lees, Vicar
In the presence of Walton King, J. H. Brown and Gladys Brown

1939 England and Wales Register
9 Clitheroe Street, Preston, Lancashire
1. Levi Bagnall, born November 30 1865, married, cotton warehouseman retired
2. Mary E. Bagnall, born July 23 1866, married, unpaid domestic duties
10 Clitheroe Street
1. Samuel Bagnall, born February 8 1898, married, works police - aircraft works, air raid warden
2. Victoria M. Bagnall, born April 25 1897, married, unpaid domestic duties
3. Mary Bagnall [later Sedgwick], born December 4 1929, single, at school

In the January to March 1960 death index Samuel Bagnall, died age 62, Preston, Lancshire, volume 10f, page 342

National Probate Calendar
Samuel Bagnall of 10 Clitheroe Street Preston Lancashire died 15 March 1960 at the Royal Infirmary Preston Probate Lancaster 4 July 1960 to Victoria May Bagnall widow and Mary Sedgwick (wife of Roland Sedgwick). Effects 3708 pounds