The watercolor below was painted by Montgomery Meigs in 1850. It depicts a slightly more bucolic and peaceful life on K St.
View from the 2nd story of the residence of Mrs. Comre. John Rodgers, Franklin Row, K Street at 12 & 13 Sts, Washington, D.C., overlooking the backyard and adjacent neighborhood, and showing children standing on balconies
Take a look at a map of the area from 1888. This is the Sanborn Fire Insurance Map of the area. You can see Franklin Alley in square 285.
1888 map of Franklin Square
Also, we came across this old classified advertisement in the Baltimore Sun, published on Wednesday, December 8th, 1841.