A rare and comprehensive collection of diapositives by the pioneering Pictorialist photographer Pierre Dubreuil, representing the full scope of his known work in this intimate and luminous medium. All but five of the transparencies bear the artist's own signature and title, lending the collection a deeply personal authenticity and documentary significance. Numbered in an unidentified hand on ink labels affixed to the cover glass, the set offers a fascinating layered history of ownership and archival care.