If you have credits on Scotlandspeople it would be worth looking up this from Anc.
1861 Census
1Society Stree,
Glasgow Barony, Lanarkshire
Caniech Chapman, 62, Head, Mar, Labourer, born Ireland
Mary Ann Chapman, 52, Wife, Mar, born England
Joseph Chapman, 35, Son, Labourer, born Lountown, Ayrshire***
David Stevenson, 21, Stepson*, Cotton Power Loom Weaver, born Maybole, Ayrshire
I am very sure this is Samuel. As there is no image on Anc I cant check anything.
I know Samuel age is out but my gut tells me its him which means he remarried to a Widow.
Familysearch has this Marriage;
12 June 1853, Barony, Lanark
Samuel CHAPMAN to Mary Ann SMITH
Remarried under her maiden name?