The Three Lochs Tour

you will take the train from Glasgow onto Balloch pier seen in this card and board the steamer Princess May sailing north to Tarbet pier. You will likely walk  the two miles or perhaps take a four-in-hand coach/omnibus to Arrochar on Loch Long where you join the steamer south to Loch Goil to view Carrick Castle before returning to Craigendoran pier by Helensburgh and the train back to Glasgow.
Extras show a steamer arriving Tarbet, railway Advertising card for Tarbet Hotel, North British steamer Lady Rowena waiting at Arrochar, Carrick Castle Loch Goil with steamer Edinburgh Castle
The 3 lochs tour ended when Arrochar pier closed in 1972