[3] The Horridge family had operated a business in Sheffield- William Horridge and Company, "Stag, Buck, Horn, Wood and Buffalo Handles, and Scale Cutters"- since 1750, producing amongst other things ivory scales for piano keys, combs, and knife handles.

His paternal grandfather was the last to be involved with the company, which was sold in 1921 for £15,000 ("when you could buy a house for £100"); after World War I, Horridge's father started a motorbike repair and sale business in his back yard, which expanded until he and a business partner were substantial motorcycle agents with a showroom and repair shops.

[7] He received the Zoological Society of London Scientific Medal in 1968 for his work on the anatomy and physiology of nervous systems of invertebrates.

[8] In 1975 he served for three months as the Chief Scientist aboard the US Research Ship Alpha Helix in the Moluccas, working mainly on the eyes of deep-sea animals.

Harcourt Robert Henry Lightburne, vicar of St Mary's, Upchurch, Kent.