A physic well, the water from which was claimed/renowned to have healing properties, used to be here.
When Corstorphine was a separate settlement to Edinburgh, then people would travel out from the city to drink some of the water from here. There was such demand that a coach service would make 8 or 9 trips per day. Knowing the name of the local watercourse, "The Stank", then I can only imagine it was smelly!
From the Dictionar o the Scots Leid (Dictionary of the Scots Language), a stank was "A pond, pool, small semi-stagnant sheet of water (Sc. 1782 J. Sinclair Ob. Sc. Dial. 196, 1808 Jam.; Per. 1915 Wilson L. Strathearn 268; Rxb. 1923 Watson W.-B.), esp. one that is overgrown and half solid with vegetation, a swampy place. Gen. (exc. Sh.) Sc. Freq. in place-names." http://www.dsl.ac.uk/entry/snd/stank_n1_v1
A wee multi here to pass the time.
At the original co-ordinates, you will find a plaque on some stones, within a fenced area. The fence has one short section and one long section.
How far are you from the original well location? This = AB yards.
When was the wellhead rebuilt? This = CDEF.
How many finials are there on the short section of the fence? This = G.
How many hoops are there on the top of the short section of fence? This = H.
How many finials are there on the long section of the fence? This is J.
The cache is hidden at N55 5M.(J-A)DH W3 1J.AM(G+C) where:
M=(J-C)