Stereoscopic view with Jessica 'Jessie' Piazzi Smyth at Guajara Station, from Teneriffe: an astronomer's experiment; or, Specialities of a residence above the clouds, published by Charles Piazzi Smyth in 1858.
The image records one of the locations where Charles Piazzi Smyth and his party set up an observatory as part their expedition to the peak of Tenerife. 'Jessie' Piazzi Smyth was a geologist and took part of geological expeditions on the British Isles, Switzerland, Italy, and, with her husband, the Canary Islands. She was also the photographer behind many photographs Charles Piazzi Smyth used to illustrate reports and publications.