SIPGSO_160425_019
Existing comment:
Lichtenstein writes to inform Johnson of his completion of two paintings she had seen on a visit to his studio: I know how you must feel, Brad and Girl at the Piano. He includes the original source material of two comic-strip clippings. The source of I know how you must feel, Brad is a comic by Ted Galindo.

Roy Lichtenstein letter to Ellen H. Johnson, 1963 Apr. 5.
Proposed user comment: