The Roberts Residence
Rittenhouse Square, Walnut Street, N.W. corner 19th
"This fine classic white marble house was built in the early 40's by the eminent Dr. Phillip Syng Physick, and was called "Physick's Folly." Bought by Algernon Sidney Roberts, a wealthy coal-mine owner, in 1864, it is now occupied by his daughters, the Misses Roberts."