I believe you and Hasta are quite right, that the James Power of Buckingham Place is not my grandfather. I'll not drop this tree altogether - I'm still curious to identify Bridget, the presumed second wife.
I've been researching my grandfather off and on for several years, but the lack of documentation makes the search daunting. My mother, now 84 years old, was only 2 when James Power died so many of her stories are second-hand. I do not have access to her original birth record. In Quebec, civil registration of all births was initiated in the 1990s - prior to then, baptismal records served as birth certificates. These have been collected and microfilmed (the Drouin collection) and are available at Ancestry.com. Unfortunately, several of the children of James Power and my grandmother were baptised at a City Mission rather than an actual parish, and some of those records were lost and never microfilmed. I have baptismal records for two of the four children. I have James' burial record, but not his death record. His uncertain marital status has caused problems in obtaining the death record from the Quebec government. They did undertake a search and informed me that they had no record of a marriage between James and my grandmother. I've not searched for emigration documents from Ireland, and the few passenger list entries of James Powers entering Canada during the period 1916-1918 have been uninformative.
A considerable amount of searchable Irish data has become available lately, allowing me to employ some new strategies. I'm searching probate indexes now and will be considering other Power families for whom a death was recorded in Dublin between 1916 and 1918, but some luck will also be required. I'll indeed take you up on your offer to be tested. Your interest and ideas will be most appreciated.
Kind regards,
Mike