Glasgow: C.W. Pearce & Co., 1907. Wraps. 116 p. 3rd ed. Some chipping at edges of cover, front cover becoming detatched at top of spine. 
According to the ads on the rear cover the second edition contains parts 1 through 6, part 13 is contained here and parts 7 through 12 & 14 through 16 are said to be "in manuscript." The British Museum Catalogue contains references to both the 2nd & 3rd editions but not the 1st, which is perhaps a ghost. In any event "edition" as used here would appear to refer to sequential publication of different material.