Seyfert, Conrad (Philadelphia, PA)
22 South Fifth street
"Conrad Seyfert with consent of his Father Anthony apprenticed to William Mentz of Phil Bookbinder" The Pennsylvania Magazine of History and Biography. pg. 225
(1794) Philadelphia City Directory, pg. 137.
(1806) Walnut near Little Seventh. Philadelphia City Directory (no page
(1807) 130 South Fifth : Philadelphia City Directory, Same address in 1808
(no page numbers)
(1819) 18 Pear Street: Hannah French, "Early American Bookbinding by Hand"
from: "Bookbinding in America" Lehmann-Haupt ed. 1967. pg.115.