Margaret Handlin/g Milroy's grandparents George Milroy and Margaret Morrow Handling married in 1899 - George 25, son of Thomas Milroy, Shepherd and Sarah, nee Briggs, and Margaret Morrow Handling 21, dau. of Peter Handling, Railway Porter and Ann Jane, nee Murray.
Margaret's birth was registered in 1878 as Margaret Morrow Hanlon and in 1881/1891/1901 family are living in Old Luce, Wigtownshire as Hanlon. So, 'Hanlon' seems to have become 'Handling' when Margaret married. Her parents Peter and Ann Jane actually married in England - 17/12/1872 Liverpool - although mother married as just Jane Murray and they had a son Douglas born in Liverpool before moving back to Old Luce. In 1851 in Wigtown Peter is with his parents Douglas and Margaret and this time surname is Handling! You could be having 'fun' with this surname.
Annette