This miniature is by an apparently unrecorded British artist named M Bryant who must have been an accomplished amateur.
However, M Bryant does display considerable talent, as can be seen in the close up image. The lace-work on the dress is also well painted.
The miniature is dated on the reverse of the black ebonised frame "March 1908" and so is useful for dating both the artist and the clothing.
The miniature appears to be signed at the lower left "M Bryant", although it is possible that it may read differently.
Sight size is 80mm x 60mm.
Unfortunately the sitter who is wearing a blue dress and a gold locket on a chain is unidentified. 1347