The style and composition of this painting would suggest that it was executed in the early 1920s.  The subjects are thought to be Apaches, as the woman on the left holds a traditional Apache basket with a beautiful star design, and the coral  hair decorations on the woman and the large high-peaked hat on the man are common among Apaches.  

On a list of paintings, perhaps consigned to the Traxel Art Galleries in Cincinnati, Sharp recorded a painting titled Apaches with measurements that exactly fit this work, a description of "three large 1/2 figures," and a price of $850.  (Sharp Papers) A painting of that title was offered in an exhibition Indian Paintings at the Hotel Gibson in Cincinnati in 1920, #27.

A smaller painting titled Apache Indian Visitors was exhibited at the artist's annual Traxel's Art Galleries show in Cincinnati in 1923.  The size that is indicated in Sharp's hand-written annotation, however, is 16 x 20 in., which does not conform with the Phoenix Art Museum records. An article in the Cincinnati Enquirer described the scene in Apache Indian Visitors as a group of Apache Indians entering an adobe house. Additional annotations about the painting by Sharp say "Old Corral [sic]" which may reference the bold hair decorations on the woman in the painting.  The Traxel Art Galleries version may have been a study or an associated work for the Phoenix Art Museum version.