Two children stand side by side in Mary and Francis Wilcox, painted in 1845 by Joseph Whiting Stock in oil on canvas. The figures are depicted indoors, holding hands, with the child on the left dressed in a blue dress and the child on the right in a green dress. Both children wear white pantalettes and dark shoes, and the child on the left is adorned with a red necklace.

The background is dark, with a heavy red curtain to the right and a patterned carpet beneath their feet. To the left of the children, a red cradle with a doll and a small table holding a box are visible, while a toy house sits on the right. The artist uses flat areas of color and clear outlines, characteristic of American folk portraiture of the period. The light is even, with little modeling or shadow, emphasizing the directness of the children's gaze and the careful rendering of their clothing and toys. Mary and Francis Wilcox was completed in 1845 and is now part of the collection at the National Gallery of Art.

Joseph Whiting Stock was an American portraitist known for his work in New England during the mid-19th century, often painting likenesses of children and families. This painting is an example of the formal, commemorative portraits popular in the United States at the time, reflecting both the style and social customs of its era.