Fillmore, A. D. Harp of Zion: A Book of Church Music. Containing also A Concise Course of Instruction for Schools and Private Learners, on Mathematically Constructed Plan of Notation. Cincinnati: R. W. Carroll & Co., 1866. 
Leather spine with printed paper boards, 1 inch thin hole near top of spines, joints good, white covers are scuffed and soiled. Oblong 16.5 cm (6 1/2 x 9 3/4 inches), title page is detached and tattered. 334 pp.; defective - lacking the last index leaf. Good. Hardcover.
This unusual tunebook replaces the shaped notes of a seven-note system with numbers. There is a number replacing the shaped-note for each sound. The music is in four parts.
With a signed provenance card from the collection of A. Merril Smoak, Jr., DWS.