Let me introduce myself -- I'm Rob Welbourn, and I have Robert Guest Gloag in my tree. Ken found my tree on Ancestry and contacted me.
I can identify the people in the second gravestone photo on page 3 of this thread.
Elizabeth (b. 1856), Emma (b. 1861) and Annie Fingleton (b. 1870) were the daughters of Mary Ann Langley and Henry Fingleton. Mary Ann's age on the gravestone looks wrong to me -- she would have been about 67, not 63, as the censuses show her to have been born in about 1830, and she married in 1851.
Surviving members of the family appear to have emigrated to Rhode Island in the early 1900s. Henry and daughter Ada moved there sometime after Ada's marriage in 1902 to William Henry Draper. Yes, Ada was the sister of Henry's first wife Emma. It was illegal at the time for someone to marry their deceased wife's sister, but it certainly happened (one of my forbears did the same thing). The Draper family, too, decamped to Rhode Island.
Now things start getting quite tangled. Another of the Fingleton sisters, Mary Ellen, who was the eldest (b. 1852), married John Owens in 1872 in Manchester. Soon after Mary Ellen died in 1904, John and their family moved to Rhode Island. Their eldest daughter, Maria Jane B Owens (b. 1873), had become Robert Guest Gloag's second wife in 1898, marrying in Barton-on-Irwell registration district. In other words, Robert married his late wife's niece, who was three years younger than her aunt.
Back to the Drapers. William Henry Draper managed to have 16 children during the course of three marriages. (There was one marriage before the Fingleton sisters), most of whom appear to have ended up in Rhode Island. One child, Raymond (b. 1900), married my relative Edith Olive Hird. The Hird family immigrated to Rhode Island in around 1882, from Bradford, Yorkshire.
So that's my connection to this tangled mess of Fingletons and Gloags.
Rob