Found this info relating to the Douglas at Goole Library:
Info taken from: Goole A port in Green Fields by Joyce Mankowska by Sessions of York 1973
Page 30
1907 saw Rawcliffe, Saltmarshe & Douglas arriving to swell the fleet.
Page 49
The White-painted Douglas, with her sister the Rother, a veteran of the butter trade from Copenhagen, was sold to Stanhope Steamship Co and renamed Stancourt, the Rother went on trading as before.
Page 52
In the years immediately before the war, the Douglas had been sold and renamed no less than four times. As Nephelgeretis, Hermes, Suzy & Iona, she sailed the Greek seas until she was sunk as a war loss in 1940