[BAKER STREET IRREGULARS]. Sir Arthur Conan Doyle: A Sesquicentennial Assessment. New York: The Baker Street Irregulars in association with Houghton Library of the Harvard College Library, 2009. 3 volumes, 8vos. Illustrated. Uniformly bound in full burgundy cloth, front boards decoratively stamped in gilt after Frederic Dorr Steele, spines lettered in gilt, in original slipcase. FIRST EDITION, ALL VOLUMES #41/75 OUT OF A TOTAL EDITION OF 300, EACH VOLUME SIGNED BY EDITORS OR CONTRIBUTORS. Titles include: So Painful a Scandal, Ever Westwood, and Papers at an Exhibition. Some of the signers include: John Bergquist, Philip Bergem, Randall Stock, Michael Eckman, Peter X. Accardo, Dan Posnansky, Daniel Stashower, Giles Constable, Leslie S. Klinger, Richard Olken, and more. This is a recent addition to The Baker Street Manuscript Series, and one of the most lauded B. S. I. publications of the last several years.