HMS Dartmouth is in South Georgia in January 1920. Most of her activity seems to involve surveying Cumberland Bay but there is an intriguing reference on 21st Jan. She is involved in deporting two boatloads of deportees from Grytviken, a whaling station. They are not willing deportees since she sends armed guards ashore to supervise their embarkation.
I haven't managed to find out who they were nor where they were deported to. They set off in two steam whalers which, even in summer, suggests they weren't going too far. Has anyone any information to share?