Dealware River League was an independent league, that was based in either New Jersey or Philadelphia from 1906 through 1921.
1906 Hopewell Pa, Lambertville NJ, Trenton, Trenton American, Trenton Bowman, Trenton Currans, Trenton Waldens
1911 Delair NJ, Palmyra NJ, Riverside NJ, Riverton NJ
1912 Beverly NJ, Florence NJ, Palmyra NJ, RIverside NJ, Trenton Roebling NJ, Trenton Taubel NJ
1919 Bash, De Laval, Empire, J. H. Barber, Morrisville (PA), Trenton-American Bridge (NJ)
1920 Bash, De Laval, J. H. Barber, Lambertville (NJ), Morrisville (NJ) Newtown (PA), Roebling, Trenton-American Bridge (NJ)
1921 Bash, De Laval, J H Barber, Lambertville (NJ), Trenton-American Bridge (NJ), Wilsonville
NOTE 1 - all other teams are unknown and if known, PLEASE email at firstname.lastname@example.org (BOLD)