Many thanks, Fortinian, for your reply.
I have seen both the links you posted but didn't know about the John Powers connection. It was the Blessig family link that led me to the Heyder family connection. I spent half of Monday in the LRO looking for Brucklay stuff with not much success but I didn't know about the Bruckley spelling and I am still waiting for responses from Liverpool College and the Russian Consulate. If I get anything else I will post it for your information, thanks again for your help.