H. Blackwell (British, active late 19th - early 20th century)
1900 (ca)
Spirit Photograph

Cyanotype
5 9/16 × 4 1/16 ins (14.1 × 10.3 cm) (image and sheet)
 
Philadelphia Museum of Art
Gift of Harvey S. Shipley Miller, 2014, Accession Number: 2014-199-26
 
LL/71369