Billhead: M. Thomas & Sons; Books and Magazines Purchased by Solomon da Silva Solis, Philadelphia, December 8, 1854 Billhead from M. Thomas & Sons detailing the purchase of 53 book and magazine titles by Solomon da Silva Solis on December 8, 1854, in Philadelphia, Pennsylvania. The invoice, totaling $26.96 and paid on December 20, 1854, likely represents acquisitions for the Hebrew Education Society of Philadelphia's library.