Thanks so much Jacquie and Charlotte for your prompt replies. In answer to your questions, the reason I thought Adelaide could have married in King's Lynn, Norfolk, before she emigrated was because her father was a Sea Captain (Barnabas Beeson) who was originally from King's Lynn, although he met a girl, Mary Ann Ainsley, in the NE seaport of Sunderland, Co. Durham and married her and settled there, so all the family were born in Sunderland. They all remained close, however, to their Beeson family in Norfolk. Barnabas died at sea, sadly with his wife on the voyage, and was buried in the Indian Ocean and Mary Ann herself died afterwards in 1906, leaving Adelaide, as the eldest, to bring up the family, of whom my grandmother Gertrude was the youngest. From what I've been told, Adelaide, who was a teacher, got fed up acting as surrogate mother to her siblings and emigrated to Canada, severing all contact with her family. I thought it was quite a courageous step for a young woman to take on her own so tried to investigate the possibility of her marrying first. I figured if she married she would most certainly marry from King's Lynn as, apart from her younger siblings, she had no close family in Sunderland but lots of close relatives in Lynn. Although I knew about the other Adelaide Beeson in Lynn, as she was a relative, I thought it was perhaps significant that there was a wedding of an Adelaide Beeson in Lynn the year following "my" Adelaide's mother's death. If she really was fed up looking after her younger sisters and brother then that was the obvious, if rather selfish, way out - and to emigrate shortly afterwards would seem the logical step if she was a wee bit ashamed of deserting her family. - All conjecture, but, as we all know only too well, you have to make quite a few leaps of faith to get anywhere in family history! Sadly, I have no clue as to which province she made for as the only thing that came down the family was that she left for Canada after her mother died and was never heard of again.
Once again, my sincere thanks for your interest. It would be incredible if a 100 year old mystery could be solved at long last!