Building, Philadelphia Not matted Letter- copy showing consigned by direct descendent of Robert George Lienroth who was art manager for lithographers Ketterlinus & Company of Philadelphia.The relationship of Leinroth to Ketterlinus & Company and Pennell is documented in "the Life and Letters of Joseph Pennell, volume one, Little Brown & Co., 1919.. Title: Building. Medium: Lithograph. Size: 22" x17". Signature: inscribed. Artist: Joseph Pennell. Unframed.