Although it is unsigned, this miniature portrait is attributed to Nathaniel Rogers (1788-1844)who mainly worked in New York City.
The previous owner of the portrait advised that the sitter was one of two twins, called Bucknell, from a Boston family, and who were both drowned in the mid 1850's. The owner had obtained this information from the estate curator in Greenwich CT. However, so far no further reference to this has been located.
The owner had two portraits showing the twins, but they were sold separately. However, a photo of the pair is shown together here. As the portraits are different sizes, and therefore probably painted at different times, it is possible they are brothers, rather than twins. One might have expected portraits of twins to have been painted at the same time and both be the same size. 320