Green’s Dictionary of Slang

swagsman n.

also swagman
[swag n.1 (3)]
(UK Und.)

1. one who takes the booty away after a successful burglary.

[UK]Hotten Dict. of Modern Sl. etc. 105: SWAGSMAN, one who carries the booty after a burglary.
[UK]Leaves from Diary of Celebrated Burglar 99/1: Our ‘swagman’ I found at his post, and telling him where to go, I left him and watched the ‘copper’ for some distance.
[UK]Sl. Dict.

2. one who receives stolen goods.

[UK]Farmer & Henley Sl. and Its Analogues.
[US]Monteleone Criminal Sl. (rev. edn) 230: swagman A receiver of stolen goods.
[US]Goldin et al. DAUL 215/2: Swagman. See Swagger.