Here is another CDV (carte de visite) from my collection of Brighton photographers, and this time with the added interest of the photographer's advertising token which I managed to purchase recently.
Tokens, such as this one produced for William Lane, were inexpensive to manufacture, and preferred by some professionals because they were much more sturdy than business cards.
Lane was at 213 Western Road, Brighton, from 1853 to 1862, so that helps to date the photograph. The lady does not look as if she was too keen to have her portrait taken, but these were early days for CDVs, which did not really become popular in France, their country of origin, until 1859, so perhaps she did not fully understand the process.
If you would like to find out more about William Lane, I cannot recommend highly enough the wonderful Sussex Photo History website's two pages of information: