on interleaving tissue, lower right, in graphite: Prof. Vogel / 1886
Georgia O'Keeffe; gift to NGA, 1949.
- "Alfred Stieglitz: Known and Unknown," The Museum of Fine Arts, Houston.
- Glasgow (no. 145, as Professor Vogel, platinotype)
- New York, Fourth Annual Joint Exhibition (no. 308, as Prof. Vogel, platinotype, silver medal)
- 1900 Newark, Ohio (no. 169, as Portrait of Professor V., 1886)