On 10/02/2014 08:28, N_Cook wrote:

snipped

Sorry, I might have a degree in Civil Engineering, and a diploma in
Topographic Surveying, but your link to GJI_ODN_slope is just a little
bit beyond me! I get the gist of it, but that is about as far as it goes.

Unfortunately our local library isn't up to much. I've been down there
before to look at old OS maps of the neighbourhood, and they have
nothing prior to the 1950's. And the local council archives are much the
same. It's almost as if the authorities around here deny the fact that
the county is more than 50 years old!!! Up in the loft somewhere I have
a set of 1950's OS maps for Northamptonshire, but nothing earlier.

Your Southampton Graffiti page missed one! From 1966, my university
days, on the inside of a cubicle door in a public loo:
HERE I SIT BROKEN HEARTED
PAID A PENNY AND ONLY FARTED

jim, Northampton