Born in Shotesham All Saints, near Norwich, he won a scholarships first to a Grammar school and then to University of Cambridge.
The object achieved is a "continuous and rigorous development of the [Euclidean] doctrine in the light of modern investigations.
"[1] In 1929 Forder obtained drawings and notes of Robert William Genese on the exterior algebra of Grassmann.
When The Calculus of Extension appeared in 1941 it was reviewed by Homer V. Craig: "The theorem density is exceptionally high and consequently despite the superior exposition it is not an easy book to work straight through – perhaps the key chapters suffer from a lack of recapitulation... [It] provides the best exposition of the fundamental processes of the Ausdehnungslehre and the most inclusive treatment of the geometrical applications available at present.
"[2] Henry Forder was elected Fellow of the Royal Society of New Zealand in 1947 and received an honorary DSc from the University of Auckland in 1959.