Letter from the Committee of Public Safety of Philadelphia to David H. Solis, April 26, 1861 Letter from the "Office of the Committee of Public Safety" in Philadelphia, Pennsylvania, to David H. Solis, dated April 26, 1861. The letter expresses gratitude for a $50.00 contribution from Solis to the Philadelphia militia for defense against potential invasion. The letter is part of the Collection E at the University of Pennsylvania.