AHA! I suspected as much, though it didn't click at first. Sarah (aka Cesairie) Boyer is daughter of Joseph Boyer and Lena Paquin. She married at Chasm Falls, NY 11 Apr 1887 Gilbert Guilbord (aka Burton Gilbert), son of Francis & Virginie Villeneuve. This makes Ambrose and Florence 2nd cousins. Marrying another Paquin descendant is very much a Boyer M.O. Of Joseph and Lena's children, Alfred m. Mary Lamica, my grandmother's aunt (dau. of Peter Jr.& Alfred's cousin Felina Crate), his brother Clement (sometimes Amos) m. Mary Paquin (dau. of Fred & Emily), & Jeremiah m. Isilda (& variants) Goure dit Lajeunesse (alias Young) (dau. of Moses & Philonise (& variants) Paquin -dau. of Felix). Of their grandchildren, in addition to Florence: George Henry Hickey (son Henry & Mary B.) m. Agnes Paquin (dau. Fred & Emily), Lena Gilbert (Florence's sister) m. George Paquin (bro. Of Ambrose), & Carl McDonald (son James & Annie B.) m. Exilda Beauvais (dau. Joseph Beauvais -gs of Aurelie (Lamica) Beauvais- & Rose Anna Crate dau. of Felina's brother Nelson).Joseph Boyer served in the Civil War and was pensioned. I have a transcription of the information from Joseph's bible around here somewhere. My mother got it from Alfred B.'s daughter Bertha. I think Clement B.'s daughter Harriet had the original. According to an obit. I found on the web for her brother, Harriet was still alive last year; she'd be around 95.