Thank you everyone for your input re Robt Crawford and the Hamiltons. I did see the two Crawford births and have recorded them on my tree as I do believe they must have been born to Elizabeth Crawford (nee Hamilton).
Here's a little timeline that might help:
Robt Crawford died Jan 1867 on board SS Sicilia
Marion Inglis Crawford m Wm Edward Gilbert in 1889
Susan McLean Crawford m Josiah Evans in 1894
Marion Hamilton (Elizabeth's mother) d 1896
Thomas Hamilton snr (Elizabeth's father) d 1897
Elizabeth Crawford d 1899
So when it comes to a tsf of license in 1906 that must be from Marion Gilbert (nee Crawford) to her uncle Thomas Hamilton (Elizabeth's brother) b 1839. I haven't been able to trace him since the 1881 census aged 40, Married (to whom?) and serving as a steward on the SS Malakoff in Pembrokeshire...thanks Mabel! I can focus my search in Glasgow now.
As for Robt Crawford's death...I haven't had experience with the Marine Death Register so if anyone can advise how I go about that it would be handy. I'm thinking that Robt died in Scottish waters? Does that mean it will come up on S/P?
Looby, your sighting of a Robt Crawford birth to Robt snr and an Ann in 1859 may be another clue in locating Robt Crawford in his life pre-Elizabeth...thank you.
Mabel, your information re the licensing of the hotel...is that accessible? And does anyone know just how many lives were lost when the Sicilia foundered?
Life was so precarious back then...