The newspaper article that hanes teulu found is a report on the death and funeral of Lizzie P. Vance of Gortward, Inver. John Coulter, Inver Railway station, was amongst the mourners.
The likelihood of there being two different John Coulters, both stationmasters working on the same railway line, at the same time, and living just 4 miles apart from each other seems a bit improbable to me. But who knows?