Printed for the Proprietor, and sold by
R. Griffiths, at the Dunciad, in Ludgate-Street. 1747.

This has the same title as the original 64 page Smith 1746 version and contains the same text in Book II. The Appendices contain several letters one of which is claimed to have been from the Prince himself. I seriously doubt this as his English spelling and grammar were attrocious (he learned from Sir Thomas Sheridan who was no better) whereas this letter is well written.

This is almost identical to the Johnston version except it includes a reference to a curious letter signed with the pseudonym Philo-Britannus (C. Davenant LL.D.) titled A Letter from a Gentleman in London to his friend in the Country and published in The Gentleman’s magazine, Volume 9 (1739) by John Nichols Page 286.