I’ve not looked at the provided links; perhaps the following has been mentioned (or, won’t match up with provided facts), but…
Mary was recorded as “Wife” on the passenger list. Perhaps married women were recorded as wife whether or not they were married or widowed, or possibly Siegmund was still alive at the time of her sailing?
If I looked at the correct 1901 census on Ancestry, Mary was living in Edmonton, Middlesex. She was recorded as married (possibly true/not true). It was suggested that the 1902 (London) death might be for your Siegmund. Seems a bit coincidental that Mary was living “near” the place where a Siegmund’s death was registered.
Siegmund was recorded as a commercial traveler. Perhaps he sailed to England, or elsewhere, sometime after Edward was conceived? My mum’s ancestor’s brother was a commercial traveler. If I remember correctly, he left Canada for a brief time, living in the U.S., so I suppose it wasn’t unusual for men to move around.
Added: the death registration provided in the first thread stated that the registration district was Marylebone which, according to an online map, is about nine miles away from Edmonton.
