But not of the Liverpool and Manchester of which the line from Ordsall to Deal Street is a branch; indeed the low mileage end is Liverpool on the Chat Moss, which is the other common choice for Up, e.g. towards low mileage. Mileages between Victoria and Deal Street are complex indeed ...
Presumably the Liverpool Party won the argument over the mileage and acquiesced over "Up" to appease the Manchester group? It all went over my head at the time ...
I have a theory that the L&M was originally "Up" to Liverpool as per mileposts and company title, but was reversed by the LNWR probably when the Runcorn direct route was opened.
This would be to fit in with Euston mileages/directions which meet the L&M at Ordsall Lane, Earlestown and Edge Hill (where Euston mileage via Runcorn continues to Lime St).
If anybody knows any better, it would be nice to know.
The early accounts of the opening of the L&M and the Huskisson accident don't help.
They talk about "Liverpool-bound" and "Manchester-bound" lines.
There are also strange discontinuities of mileage on the network.
Garston was originally reached from Timperley via Lymm and is at mileage 24.
But the LNWR new line used the same route from Ditton to Speke, using Euston mileages, so now Garston is isolated but still with a short stretch of Timperley mileage from Speke.
Marylebone is the odd one out of the London terminals in not having a zero mileage.
It's 205.77 miles (Up) from Manchester Piccadilly via Woodhead and Aylesbury.