Facsimile photograph of a pencil drawing by Sir John F.W. Herschel, Bart., K.H., June 28, 1824. Sketched by means of a Wollaston's camera Lucida. Temple of Juno, Girgenti, Sicily. Sketch no.393. In glazed frame 9 1/4"x7 3/4" outside Photograph of a pencil drawing made using a camera lucida 1824