Portrait of a child probably dates from between 1885 and 1890, but could date from much later. 1

It is just possible that it is the unlocated portrait listed as Little Maud Hamerton [YMSM 347], which dates from between 1885 and 1887.

Portrait of a child, Colby College Museum of Art

Arrangement in Grey: Portrait of Master Stephen Manuel, private collection

It is hard to date. It is roughly dated from the technique and resemblance to other portraits of children, such as The Chelsea Girl [YMSM 314] and Arrangement in Grey: Portrait of Master Stephen Manuel [YMSM 321] in the mid-1880s.

A Corsican Child, The Hunterian

However it also resembles much later paintings such as Portrait of Miss Amy Brandon Thomas [YMSM 392], Alice Butt (1) [YMSM 437], and Alice Butt (2) [YMSM 438] in the 1890s, and A Corsican Child [YMSM 544] in 1901.