Note 11 — NOTE. THE CLERKS OF PENICUIK AND MAXWELLS OF MIDDLEBIE.

See “Biographical Account of the late Dr. James Hutton, F.R.S., Edinburgh,” read by Mr. Playfair, in Transactions of the Royal Society of Edinburgh, vol. V. He made a tour in the north of Scotland in 17 64, “in company with Commissioner, afterwards Sir George, Clerk, in which Dr. Hutton’s chief object was mineralogy, or rather geology, which he was now studying with close attention.”