The text given here is that to be found in the following book:

The Advantage of a National Observance of Divine and Human Laws. A Discourse in Defence of our Admirable Constitution. By a Country Post-Master. To which is added, Mr. Justice's Ashhurst most excellent Charge to the Grand Jury, for the County of Middlesex. Ipswich: J. Bush, 1792. [ms superscription: July 26. From the Author. P. Deck, Postmaster at Bury with several other Copies.] 22 pp. [B.L. 8135 b. 19.]

There exist several other editions of the text of Ashhurst's Charge, among which, one translated into Welsh. The Charge begins p. 23, and is thus introduced:

“The Charge of Sir William Ashhurst delivered to the County of Middlesex, November 19, 1792… breathes so much the true Spirit of the English Law, and is so well suited to the curb the Presumptious Spirit of the Times, that it must be read with Pleasure by every true Englishman.”