November 8, 1802, in a farmhouse called Chwibren Isaf, at the foot of Mynydd Hiraethog, Llansannan Parish, Denbighshire, Wales.
November 8, 1883, Chester, England.
In the family plot, Smithdown Road Cemetery, Toxteth, Liverpool, England.

Known as a preacher and lecturer, poet, novelist, astronomer and political thinker, Rees pastored in Liverpool for over 30 years.