OK - Having read through all 42 pages, if anyone wants to see the original "finds" regarding Colin, they're on p.20 & 21, but to recap quickly:
Colin married Elizabeth Jane Dale 30 Sep 1848 St Thomas, Stepney.
On the 1851 census he's a provisions merchant; in 1861 a ships chandler.
Known children:
George Robertson b. c1849, London
Hannah M Robertson b. c1854, London
Henry D Robertson b. c1856, London
So a few more rellies to follow up!
Rambler