Sydenham to Crystal Palace, just a couple of caches to fill in the area.
A simple multi to continue the series, on the front of number 17, there is a blue plaque for the “Pioneer of the Screw Propeller”. He resided here between ABCD-ABEF.
N51° 25.CEB W0° 04.DEE
Checksum - 56 (Note the lettering)
Parking available on Sydenham Hill nearby.