The published co-ords has significance for the cache, but it is not there.
This engineer and inventor was a resident of the Crystal Palace area for a while and had a property in Crescent Wood Road. He was born in ABCD and died EFGH.
Oliver Hutchinson was the business partner to this inventor and the first subject for his invention. Paddy Naismith was the subject of a vastly improved version of this invention.
Cache can be found at N 51 25.F(H-A)(G+E) W 000 04.(G-E)D(F-C)
There is a blue plaque just down the road from the final co-ords to the memory of this inventor.
(Checksum for all numbers – 48)