 He also worked with the architect Cyrus Lazelle Warner, whose office was a few doors from that of Upjohn's.In 1846 Eidlitz formed a partnership with the German immigrant architect Karl (now Charles) Otto Blesch, who had trained in Munich with Friedrich von Gärtner.One of their several joint commissions in New York was for St George's Episcopal Church (1846–49), still standing on the west side of Stuyvesant Square.