Hi Greg,
Thanks for the list of James and Margaret Doyle's children. I noticed that you had found the two Margaret Caseys who died in 1907. They were mother in law and daughter in law. Margaret Theresa Casey nee McCarthy (1862-1907) was the second wife of William Casey (1852-1917), the eldest son of Thomas Casey (abt 1820-1879) and Margaret nee Doyle (abt 1826-1907). Margaret Casey nee McCarthy died on 27th May 1907 and her mother in law, Margaret Casey nee Doyle, died on 7th June 1907.
Margaret Casey nee Doyle's father, James Doyle is listed as a Gas Company Employee on her 1907 death certificate. Unfortunately, the James Doyle (1796-1878), husband of Margaret nee McDonnell (1798-1866) is listed only as a 'Gentleman' on his death certificate, aged 82.
Do you subscribe to Ancestry? I have put a lot of this information on my family trees there.
Cheers,
Laura