Cyberhymnal: Albert Benjamin Simpson - Biography and seven Gospel songs (words and MIDI files). - http://www.cyberhymnal.org/bio/s/i/m/simpson_ab.htm
Rediscovering the Music of A. B. Simpson - Critical article (with footnotes) about his musical compositions. - http://online.auc-nuc.ca/alliancestudies/ahtreadings/ahtr_s3.html