subs. (old).In pl. = folly (B. E.), hence, as in proverb, To go to Battersea to be cut for the SIMPLES = to take means to cure of foolishness (Battersea was famous for its herb gardens). Also SIMPLETON (SIMKIN or SIMPLE SIMON) = a credulous person (B. E. and GROSE): SIMPLE SIMON Suck-egg Sold his wife for an addled duck-egg (RAY).
c. 1710. SWIFT, Polite Conversation, i. Indeed, Mr. Neverout, you should be CUT FOR THE SIMPLES this morning.
1834. SOUTHEY, The Doctor, cxxxvi. What evils might be averted in the Lords and Commons by clearing away bile and occasionally by CUTTING FOR THE SIMPLES.
1876. C. HINDLEY, ed. The Life and Adventures of a Cheap Jack, 7. Many more are CUT FOR THE SIMPLES.