This name & locationof this foundry is not known, but their work is. We can identify their castings by their marking: a Logo. The Logo is a small circle surrounded by 3 concentric C's with a not quite vertical slash.

This foundry made at least 3 doorstops and a bookend all marked on the back with their Logo.
The 3 doorstops were Flower Baskets and the bookend was a "Saddled Horse Grazing"
The Flower Baskets may be seen under:
"Known Makers" on the homepage.
No Other Information is known.

3 Known Flower Basket Doorstops:
FRENCH BASKET
POPPY POT
NASTURTIUMS