XCC2972704:
The Entrance to the Harbour of Marseilles, c.1838 (w/c with touches of gouache, over traces of graphite, and scraping, on off-white wove paper), Callow, William (1812-1908) / Bridgeman Images
IMA1557630:
Glacier Du Rhone And The Galenstock, From The Furka Pass Road (watercolour over pencil heightened with white on off-white paper), Callow, William (1812-1908) / Bridgeman Images