I have had a difficult time deciding which "sister" to highlight this week, but finally decided on one that was somewhat of a puzzle early on. For decades we "knew" that my great-great-grandfather's brother had married my great-great-grandmother's sister. (The gr-gr-gf was Samuel Gordon .. the gr-gr-gm was Emily Elizabeth McCrea. The gr-gr-granduncle was Wallace Gordon. The gr-gr-grandaunt was Catherine Eleanor McCrea.)
Only .. he didn't.
Gr-gr-grandmother's sister (remember, this was Catherine Eleanor) married someone totally unrelated (James Christie Peattie), something I finally, fully, sorted out late last year/earlier this year.
BUT, what I did discover more recently was that the "name-alike" gr-gr-grandfather's brother had married was, in fact, the sister of my gr-gr-grandfather's father-in-law. (So, remember that the gr-gr-gf was Samuel, so his father-in-law would be my gr-gr-GR-grandfather (James McCrea .. HIS sister was Catherine McCrea)). We had originally thought that the parents on the death registration for Catherine Gordon née McCrea were a mishmash of her sister's name (younger sister, Margaret Hamilton McCrea), but, again, I proved that was incorrect when I discovered that Margaret Hamilton McCrea had died aged only 11 weeks. (It was, however, a mishmash of her mother's name and her father's name.) Then came the discovery that James hadn't emigrated to Australia from Scotland, but from Ireland; and he hadn't emigrated alone as we'd long believed (very little information was passed down as the gr-gr-gm and her sister were double orphans before the elder was 10), but his mother, brothers and two sisters had emigrated later the same year (but arriving early the next year) on a different ship. The two sisters were Bounty immigrants, as was the gr-gr-gr-grandfather. Some thirty years later and the gr-gr-gr-gf had been dead for 13 years and his younger daughter (Emily) marries a Scotsman (in September). Then, a couple of months later in the same year (November) his younger sister married his daughter's new brother-in-law.
So, it wasn't yet another case of two brothers marrying two sisters (which seemed to happen a LOT in a couple of my branches!), but a case of two brothers marrying aunt and niece!
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(I hope you, dear reader, are not as confused as I still sometimes feel when sorting through this lot.)