I am currently (Sep 2001) actively researching the following lines. Let's share:
McTurk (MacTurk) in Pennsylvania, especially Philadelphia and Girardville coal area.
Dockrell line in New England, Philadelphia and Dublin,Ireland and, Enniscorthy Ireland,
McKenzie line of Praraie Lea, Texas
Audibert and Schunder Lines of Delaware City, DE and Philadelphia area.
Gibson in Philadelphia.
Emmil of Ohio
Menuez of Ohio, especially Ross Co. and Chillicothe area