Middlesex 849, Spence's (Dalton & Hamer, page 176)

Denomination: halfpenny, scarcity: Fairly common
849.  O: A man sitting in prison gnawing a bone. BEFORE THE REVOLUTION. 
         Ex.: 1795. Same obv. for Nos. 849-856, as rev. of No. 790.
      R: Britannia seated. ROUSE BRITANNIA. As No. 678.
      E: Plain.

No. 849, fairly common.

Keywords

before the revolution 1795,rouse britannia