See View of the Hard-Labour Bill, Lond. 1778, p. 100.

For the idea of this property, I must acknowledge myself indebted to an anonymous letter in the St. James's Chronicle, of the 27th of September I777; the author of which is totally unknown to me. If any one should be disposed to think lightly of the instruction, on recount of the channel by which it was first communicated, let him tell me where I ean find an idea more ingenious or original.

IPML Chapter 15