Green’s Dictionary of Slang

fencer n.

[fence n.1 (1)]

1. a receiver and seller of stolen property.

[UK]Dekker Gul’s Horne-Booke 8: He shall strait waies be [...] tane in his own purse-nets by fencers and cony-catchers.
[UK]Four for a Penny 3: He is the Treasurer of the Thieves Exchequer, the Common Fender [sic] of all Bulkers and Shop-lifts in the Town.
[UK]Defoe Street Robberies Considered 32: Fencer, Receiver of stolen Goods.
[UK]J. Poulter Discoveries (1774) 42: I am a Locker, and a Dudder, and Fencer of Slop; I leave Goods at a House, and borrow Money on them, pretending they are Rum Goods, Goods made in London, and sell Tea.
[UK]Whole Art of Thieving [as cit. 1753].
[Aus]Sydney Gaz. 11 Apr. 3/3: I have been preyed upon by sharks, sharpers, flash-men, fencers, rum coves, squatters, nippers, lifters, and all the tag-rag-and-bobtail denoted by the worst words in the Slang Dictionary.
[UK]Public Ledger 12 Nov. 3/3: Receivers of stolen goods Fencers.
[UK]W. Phillips Wild Tribes of London 70: This, you see, is a fence-house; and those what we call Petticoat-lane fencers.
[UK]Hotten Dict. of Modern Sl. etc. (2nd edn).
[UK]Hotten Sl. Dict.
[US]J. Flynt World of Graft 91: Mother Mandelbaum was the most prominent ‘fencer’ New York has ever had.

2. (UK tramp) a door-to-door hawker.

[Aus]Advertiser (Adelaide) 25 Oct. 32/8: No ‘maunderer’ (tramp) nor ‘fencer’ (door to door hawker) need ‘clem’, (starve), or do without ‘chow chow’ (food) if he follows the many ‘patterans’ (private marks) which tramps make on or near the doors of generous householders.

In compounds

fencer’s wharf (n.)

(UK Und.) a receiver’s warehouse.

[UK]Duncombe New and Improved Flash Dict. n.p.: Fencer’s wharf the place where on being received, stolen goods are instantly passed through a secret trap-door or wicket, to defeat the vigilance of police officers who may follow with a search-warrant.