The photographs in Harriet E. Monroe's "Washington Its Sights and Insights" are credited to "Clinedinst" in each  case, but I can find no credit for the cover illustration, shown above. The illustration is glued on to the cover of this 1903 Funk & Wagnalls Company publication. I find the work quite beautiful.

There are numerous related and unrelated Clinedinst artists in illustration and photography in the 1800s and early 1900s, but I assume the photographer is Barnett M. Clinedinst, Jr., born in 1865. He was apparently well known as a Washington, D.C. photographer, and is referenced as the Secretary of the National Camera Club in the 1895 edition of "The American Amateur Photographer" publication.

That time period must have been an interesting one for visual artists, as photography grew in influence. A November 1901 New York Times article titled "Camera's Inroads in Field of Illustrating" notes how newspapers and weeklies were gradually shifting from illustration to photography as both a time and cost saving effort. (Today, the film to digital shift has made its own impact.) From the article's opening:

"The camera is making deep inroads in the market of the artist whose greatest source of income was at one time the field of illustrating. The average illustrator is looking on the improvements in camera work with consternation."

The article continues to discuss the shift from the standpoint of the publishers and the artists themselves, and a reference to the Washington Clinedinst is made.