Can you believe I scooped up this treasure for only $8? And that since I had $6 in store credit, I only paid $2? This book was published in 1938 and opens with A Note to the Reader:
The Complete Sherlock Holmes is the only complete, definitive edition of these famous stories. Heretofore nine separate books had to be purchased to obtain these thirteen hundred pages of the best detective fiction in English literature. They are now brought together for the first time in one volume, containing the authoritative text of every Sherlock Holmes story ever written.
It's a brick, a real pain in the ass to carry on the subway, but I'm so happy to have found it.