Hi Scully
Struggling to find them Scully
This might be the Charles who shows with them in 1851 as visitor in the 1861 census:
Charles Hendry 24, ironstone miner b. Ayr
Catherine Hendry 22 b. Johnston, Renfrew
Mary Hendry 2 b. Johnston, Renfrew
Anne Colquhon 10... a bit of a mess this one, shows as: Sister-in-law, Watchman & Pensioner!
Address: Craigs Land, Dalry
Can't see John and this a maybe for wife Mary in 1861:
Mary Hendrie, 46, sewer of muslin, b. Ayr
Address: W Side Of Wallace St, St Quivox
Monica