The Constantin Kluge - Pierre Leroy collection consists of 34 personal, autograph signed letters from Father Leroy to his friend Constantin Kluge, in addition to first-hand background information provided by Kluge on his acquaintance with Pierre Teilhard de Chardin and his circle (especially Pierre Leroy and Claude Riviere). A complete typed transcription of the 34 letters has been graciously provided by Mme. Solange Soulie, a close friend of Pierre Leroy.
Photocopies of eight signed typed letters in English, from Pierre Teilhard to Walter Granger and two signed typed letters in English, from Walter Granger to Pierre Teilhard, from August 7, 1924 to November 8, 1936. Originals of some of these letters may be found in the Granger Collection.
Photocopies of four signed typed letters in English, from Pierre Teilhard to Walter Granger and one signed typed letter in English, from Walter Granger to Pierre Teilhard from October 10, 1937 to April 17, 1941.