Jacob Monk (fl. c. 1850 - c. 1860) Jacob Monk (fl. c. 1850 - c. 1860) was a Baltimore based American publisher of wall, pocket, and case format maps active in the mid-19th century. While Monk's maps are quite popular and enjoyed a wide distribution in the 19th century, little is known of his personal life or history. Click here for a list of maps by Jacob Monk. Rare maps by Jacob Monk currently for sale. Rare maps by Jacob Monk in the Geographicus Antique Map Archive.