William Bourne was an English mathematician, innkeeper and former Royal Navy gunner who presented the first design for a navigable submarine and wrote important navigational manuals. He is often calle
Submarine by William Bourne, in Inventions or devices, 1578.
Leonard Digges (scientist)
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Leonard Digges was a well-known English mathematician and surveyor, credited with the invention of the theodolite, and a great populariser of science through his writings in English on surveying, cart
William Bourne (mathematician)
…fashion of standing. The 110th entry is what seems to be a type of telescope. The device was said to have been employed by mathematician and surveyor Leonard Digges and Bourne was asked to investigate it by Queen Elizabeth I's chief advisor Lord Burghley. Bourne's is the best description of it, and from his writing…
Title page of Leonard Digges's Pantometria (1591)