The immaculately preserved Edinburgh & Glasgow Railway milepost of 1842 at the buffers of Platforms 2 & 3 at Queen Street where it was placed in 2008 see image 5245. 'Edinburgh' for the first few years was Haymarket, hence the slight short total mileage compared with today. I doubt very much whether it was painted warning yellow in 1842, but I don't suppose anyone is suggesting that it was and at least it's more conspicuous like this.
Location: Glasgow Queen Street High Level
Original line: Edinburgh and Glasgow Railway
Photographer: David Panton
Contact photographer: David Panton
Date: 02/05/2011
Image number: 33928