Charles Piazzi Smyth 1850s Huge fragments of trachyte on Mount Guajara (alt. 8890 ft) [Tenerife, Spain]
Stereoview Private collection of Jason David Wright (Alan Griffiths, 6 August 2020) The attribution is based upon stereoviews taken at the same location and date that were published in C[harles] Piazzi Smyth, 1858, Teneriffe - An Astronomer's Experiment, (London: Lowell Reeve)
