Hi Linda,
Yes, it was in American format. I should have thought about that. She was supposedly born January 8, 1872. She shows up in New York in the 1900 census, married to John McDonald. According to that census, they had been married for 10 years and she arrived in 1888, although in 1910 she is listed as arriving in 1886. John arrived in 1882 from Scotland according to his naturalization index card.
Both of their parents were apparently born in Ireland. She died on 9 Dec 1966 in New Jersey. I have not yet ordered a copy of her death certificate to see if it provides any additional information.
I have found a marriage record for a Patrick Doyle and Mary Snee in the GRO index in Mar 1866 in Dewsbury. However, what confuses me is that there is also a listing in the index for a marriage between those same names in Dewsbury in June 1896. I thought perhaps this could be a renewal of vows, but I am not sure how common that was in the 19th century. Plus, Dewsbury does not appear to be near Briston, so I have been hesitant to order a copy of this record. Particularly because I have no additional information to cross reference it against.
Josh