The cache is in Crawley's industrial estate in Napier Way.
Many roads in the estate are named after famous scientists, in this case I presume it is the seventeenth century scottish mathematician and physicist.
Napier's bones is an abacus created by John Napier in 1617 for calculation of products and quotients of numbers that was based on Arab mathematics.
Good hunting. You may also be interested in my other caches.