Library's copy lacks t.p., including all title and imprint information.
Page 58 contains "Preludes in the key of F" and the first 4 mm. only of "Preludes in the Key of B. bb."
Likely imprints: London : Printed for the author, to be had, at Mr. Welckers, [between 1777 and 1779] OR London : Longman & Broderip, [between 1780 and 1785].
Bracketed t.p. transcription, except for book no., from record for first of the above-mentioned publications.
Leigh, Augusta, 1784-1851, former owner.