Pages 585-586 and 666-667 extracted from this edition of the London Magazine and bound between paper covers.
Boldly written in ink on front cover by Ilbert, "Nov: 1765. Excerpt from London Magazine. Mr: Harrisons Timekeeper - Certificate and Improvements"
In the first part, details are given of money to be paid to John Harrison, "...when, and as soon as the principles upon which his watch, or time-keeper, is constructed, are fully discovered, and explained, to the satisfaction of the commissioners ..".