Millions of miles of safety fuse had been produced by then. Bickford's grandson William Bickford-Smith bought Trevarno in 1874 from the proceeds of grandfather's invention.

Millions of miles of safety fuse had been produced by then. Bickford's grandson William Bickford-Smith bought Trevarno in 1874 from the proceeds of grandfather's invention. Photo: Bernie Pettersen ...