Do you know how you came by the maiden name of Alfred's mother? I have tried to trace Alfred's baptism with no success so far.The parents do seem to be to much of a coincidence.I have not been able to trace their marriage neither,unless they married elsewhere other than Gravesend.
I have traced a Alfred George Johnson,who died in Gravesend in 1939 and was born in 1881,wheather this is the same one that i traced earlier,i wouldnt like to say.As nigel said earlier,it would be best to get his birth cert to see if he was born on May 5th.Did you know also,that Princess Phocohontas is buried in Gravesend?
kind regards john
PS...i wonder if they married on board ship whilst on their way to the states?