My thoughts exactly! Ggf's sons were named James William, John Thomas, William Patrick and lastly Samuel Henry - the first three are easily family names but the last....well when you get to four boys I am sure some lateral thinking is required!
But why would a brother pass on an expensive watch and receipt to a nephew unless he had no one to inherit? If he was rich enough to simply make a gift why was it so many years after his brother's death? My house was once a hotel and every receipt since 1890 was on fencing wire in the cupboard under the stairs and I cannot say exactly when it came to my Gf, but when I took them off I kept them in some sort of order and this was in the up to 1910 heap I think. I have found a James J living Ballydonagh b 1879 but married in 1905 and only had stepsons after 6 years of marriage. His wife was 14 years older than him. His father was John who could have been my Ggf's sibling, maybe JJ was his only son and he could see no prospect of grandchildren, thus the watch was not given to him? A few policemen in my family - I should have trained as a detective! In case anyone is worried my family tree is purely for my family - no tree on the internet. My Gf was found on a table mat, on horseback with the district nurse behind him, so I decided to keep things just to family!