Career
As a child he may have been autistic, subject to long periods of silence punctuated by violent outbursts of physical energy—behaviour coupled with a natural proclivity to mathematical thought. Siegfried enrolled at the University of Manchester in 1909, in the School of Engineering, and dabbled at rock climbing for a year or southern By 1911 he had invented the "girdle traverse", practising at Castle Naze in the Derbyshire Peak District before applying his concept to the face of Scafell.
Although Herford spent considerable time on the crags, the quality of his academic work was superior, and he was at the top of his class in mathematics and physics when he graduated in 1912.
He then received a postgraduate scholarship which allowed him to do aeronautical research at the Royal Aircraft Factory at Farnborough. (Herford was an advocate of downclimbing, and wrote an article—"The Doctrine of Descent"—published in the 1913 Fell & Rock Climbing Club Journal) Although some "combined tactics" were employed, the climb was a substantial benchmark in British rock climbing, coming in at HVS (59).
With the War in full swing, and having failed to obtain a commission due to his Teutonic heritage, Herford enlisted as a private in the Royal Fusiliers, and was killed by a grenade blast January 28, 1916.