Actually the first thing that I did was call the number I had for the incall but there was no answer - the number was for a telephone contact that was not physically located at the incall.
Second I was visiting Victoria and would be departing the next day, there wouldn't be time to wait around to locate the ring.
Third, the best way to retrieve something when you know exactly where you left it is to return to where it is as soon as possible. The more time that passes the less likely it will be that the item will be still be there. On that same trip I left a brand-new Seiko digital watch on at a wash basin on the BC Ferries. I returned less than five minutes later but the watch was gone and no one turned it in. Reward offered, announcement made by the purser - no luck.