 Josephson petitioned the synagogue board to build a mikveh in 1784 and by 1786 it was open under Johnson's organization.Seixas returned to New York in 1784 and Mikveh Israel invited his replacement at Shearith Israel, Jacob Raphael Cohen (1738-1811) to Philadelphia in Seixas' place.Cohen served at Mikveh Israel from 1784 until his death in September 1811.