Rudolf Müller (Swiss 1802-1865) and Friedrich Horner (Basel 1800-1864)

Rudolf Müller (Swiss 1802-1865) and Friedrich Horner (Basel 1800-1864)
A view of the bay of Naples with Mount Vesuvius in the background, taken from the villa Bocca Pianola in Castellammare di Stabia; and S. Croce, Castellammare di Stabia, drawn from the terrace of the villa Bocca Pianola
with a piece of the old mount inscribed and dated 'From the Villa Bocca pianola-Castelamare/by M. Muller Augt. 1832.'; signed 'F. Horner', and with a piece of the old mount inscribed and dated 'church of Santa Croce- Castelamare/ sketched from the Terrace of Casa Bocca pianola with S. Galton./ sept. 1832 by M. Horner of Rome'
traces of pencil, watercolour and gum Arabic, unframed
7¾ x 10 1/8 in. (18.8 x 25.8 cm.) and 7 7/8 x 10¼ in. (19.9 x 25.9 cm.)
(2)a pair