Looking west at the Clark house (formerly the Otis Withington house), roughly located at today's Lancaster Terrace. At the far left of the photo is Washington Sq.

From the 1887 photo series taken just before the widening of Beacon St., most likely by Augustine H. Folsom, a Boston photographer.
incl. Streets

[Courtesy of the Digital Commonwealth (CC BY-NC-ND). From the Brookline Photograph Collection published by the Public Library of Brookline]