Have given this a little more brain power... deep breath...

azimuth (angle from North, counting clockwise) = arctan((Easting of hill - Easting of tomb) / (Northing of hill - Northing of tomb))
Arctan is the inverse tangent and you can get that off the old Windows calculator accessory if you don't have a scientific calculator. Usualy there is a small adjustment mentioned on the map somewhere to bring the grid into line with True North (not magnetic north!)

Similarly for the elevation: arctan((height of hilltop - height of tomb) / distance as crow flies from tomb to hill)

I always feel the need to apologise after getting mathematical, but hopefully this will do the trick for the first part of the puzzle. Send me the numbers if you get stuck!

Rob