Thanks, Rick. And also duttonbay.
An interesting little conundrum. Marc Fiddian's book Trains, Tracks, Travellers
lists the opening date of the relevant line as the 19th December 1877, and the section "Hamilton to Portland Pier". But (thinking out loud) I wonder if 1883 timetable meant the more northern station, which, I was given to understand, was originally called Portland, changed to Portland North when Portland Pier was renamed Portland, and reverted to the name of Portland in May 1968 when the line to the seafront station closed. The Portland North station (under whatever name) appears always to have had a substantial station building worthy of a terminus, at least until it became a terminus, and in the manner of the times, the Victorian brick building was demolished and replaced by a distinctly forgettable 1960s structure that looked line a 1950s American petrol station. (How apt was the B.P. sign in the background!)
Anyway, on to the next teaser:I am a closed station on a still open line. No passenger trains now grace this particular section of track, but at one time there was a through passenger service and one that terminated in my precincts.