You seem to be mis-understanding me. When I had finished capturing all the rats, I went to a guard to be caught and it simply teleported me to the last room I had been in, the one where you go down the ladder to access it. The only way I got back to Ardy was by re-climbing the trellis on the second floor of the building, the way I got to that floor in the first place. I was then taken to ardy without returning to the garden.