Greg was ed­u­cat­ed by Dr. Lant Car­pen­ter in Bris­tol, and at Ed­in­burgh Un­i­ver­si­ty. He owned Low­erhouse Mill in Bol­ling­ton, near Mac­cles­field, and ad­dress­es he gave at serv­ices con­duct­ed for his work­ers were pub­lished post­hu­mous­ly in 1877 as A Lay­man’s Le­ga­cy. His other works in­clude:

• Scenes from the Life of Je­sus, 1854

• Nutter, p. 411

1. My Soul in Death Was Sleep­ing
2. Slowly, Slow­ly Dark­en­ing
3. Stay, Mas­ter, Stay up­on This Hea­ven­ly Hill