A Treatise of Pleas of the Crown; or, a system of the principal matters relating to that subject, digested under proper heads is an influential treatise on the criminal law of England, written by William Hawkins, serjeant-at-law, and later edited by John Curwood, barrister. It was first published in 1716[1] and went through eight editions, the last[2] of which was published in 1824.
It is often cited as "Hawk.P.C." or some similar variation on this.
Eighth edition of this book (1824) from Google Books: