I have tried to E-mail you direct at the address you gave but find that it does not work.
I cannot find an immediate link at the moment but a large number of my ancestors were SEABROOKs from London and I think there could be a connection with your grand-father. My mother and I have been researching for several years and we know of nearly 60 SEABROOKs directly connected to us ranging from Robert SEABROOK, born abt 1774, to the present day.
Would you be able to send me some more information concerning your grand-father, in particular any details of his parents, grand-parents, brothers, sisters, sons, daughters etc., and I will see if I can find a link to our side of the family.
Do you happen to live in the Bury St Edmunds or Walton on the Naze areas? My mother has found that we are linked with a Paul SEABROOK who was possibly living in those areas, but we haven't been able to trace him yet.