This book contains the text of Reverend William T. Catto's sermon "A Semi-Centenary Discourse," and a history of the First African Presbyterian, the nation's first black Presbyterian church, founded in Philadelphia in 1807. The volume has 111 pages bound in black cloth and gilt lettering on the front cover. Inscriptions are handwritten in black ink and black crayon on the final interior page regarding former owners and givers of the book. The book also contains a biography of its founder, the formerly enslaved Reverend John Gloucester and an Appendix with information about other historically black churches in Philadelphia.