Green’s Dictionary of Slang

chattery n.

[? chats n.2 , i.e. they are easily infested by lice]

(UK Und.) one or more linen articles.

[Scot]D. Haggart Life Glossary 171: Chattery, cotton, or linen goods.
[UK]Egan Grose’s Classical Dict. of the Vulgar Tongue.