"C Inness" is a name chosen by the art factories in China - much like "Wallace" and "BC Wellan" at ebay. None of the paintings have any provenance, titles, or dates. Presently there are no less than 25 "Inness" paintings listed for sale.
Clara D Innes (correct spelling) did not paint any of the hundreds (or thousands) of paintings attributed to her. Her family has never seen any work by her and knows nothing of her being a painter - never mind a prolific one. Some of the materials used were not made until the last 10 years of her life - she'd have been extremely busy. The "Inness" signatures used to change but have settled on a block letter.
One "C Inness" painting, bought in Montreal, came with a typed letter attached claiming the artist was an elderly Carl Inness in Amsterdam, another claimed ex-RAF Colin Innes, both reputed to have been recognized and shown but nothing else could be found (Colin Innes in the RAF died in service).
Check out Dafen Art Factory, or Chinese art factories.