Someone in the above postings mentioned that trams transferring between the Watsons Bay line and the George St line at the King St/George St intersection would not have been carrying passengers. Doubt on this score is raised by the fact that the side desto rolls for Watsons Bay cars had "Fort Macquarie Depot" on them (the only time Fort Mac was referred to as a depot) so it could be assumed that they would have been carrying passengers, otherwise they would have shown "Special". This is verified from one such roll in my possession.
Edison, I've just had a look at an Eastern Suburbs side destination roll which I've had for some years, and while it shows "Waverley Depot" and "Dowling St. Depot", Fort Macquarie is shown as "Fort Macquarie". Now, I realise that this doesn't prove anything one way or the other, so I'll have do a bit more digging. I dare say that passengers were carried on depot runs in Sydney, but - possibly - not all the way to the depot. For example, trams proceeding to Dowling Street Depot by way of Anzac Parade or Alison Road displayed "Kensington" in their end destination boxes. Passengers would alight at Kensington Junction, and the tram would then proceed empty to the depot by way of Dacey Avenue. Similarly, trams proceeding to Rozelle Depot would discharge their passengers at Epping Junction (where the Lilyfield and Balmain Lines diverged). At other depots (e.g; Waverley, Ruschcutter's Bay, North Sydney) passengers would alight from the tram outside the depot.
As I said, I'll go through my various Sydney tramway books, and see what I can come up with. I do recall, however, a picture in Trams Down Under, showing an R class car turning from King Street to George Street. Unfortunately, I can't recall what was on the front desto.