(MUSIC.) Willoughby, Robert. Social Harmony; being, A Choice Collection of Catches, Glees, Songs, &c. for two, three & four Voices by Eminent Composers. [2], 96; 180 pages, with text and music entirely engraved throughout; possibly lacking Volume 2 title. 2 volumes in one. Oblong 8vo, contemporary 1/2 roan, extremities worn, front joint cracked, cords intact; contents toned with occasional soiling, 2 leaves torn with slight text and music loss. Contemporary ad leaf ("Peck's Catalogue of Sacred Music") tipped in. [London]: Printed for the Editor and sold by Him at No. 11. New Round Court, Strand, circa 1800?