Two ink signatures of Roy Chapman Andrews and Paul du Chaillu, the latter adding, “New York, May 15th, 1867,” the first on an off-white 5 x 3 card, and the second on an off-white 4 x 2.5 clipped sheet. In very good condition, with a cross of toning to the first signature, and intersecting folds, scattered toning, trimmed edges, and mounting remnants on the reverse of the second. RRAuction COA.
