London: Collins, 1975., Gilt cloth boards. First edition of this contribution to Holmesana. With the author's year of publication signed presentation inscription to George & Beryl Sims on the free endsheet. Boards a little rubbed and with some light wear at edges, one leaf with a short narrow crease along the fore-edge, else very good in a rubbed and moderately edgeworn dust jacket. Booklabel of George Sims.