Francis Blackwell Mayer (December 27, 1827 – December 5, 1899) was a prominent 19th-century American genre painter from Maryland. While he spent most of his life in that state, he took a trip to the western frontier in the mid-nineteenth century and executed a series of drawings of Native Americans; he also studied in Paris for five years in the 1860s.
Primarily known for his oil paintings and watercolors, he also worked in other media, including pen and crayon drawings, engraving, and illustrating. Many of his work have historic themes.
Source: Wikipedia, "Francis Blackwell Mayer", available under the CC-BY-SA License.