Peter Masson wrote:
"Mizter T" wrote

And where was Snow Hill station - was it located under Holborn Viaduct
station?

Yes - opened 1 August 1874, renamed Holborn Viaduct (Low Level) 1 May 1912,
closed 1 June 1916. Apparently until around 1960 it was possible to push on
a unlocked door on the concourse of Holborn Viaduct, descend some dark
steps, and end up on the disused platfroms of teh Low Level station. There
was also an entrance from the north side of Holborn Viaduct (street0.

Peter

Thanks to both Peter and Jock for your replies.

The seemingly contradictory answers from Peter and from Jock can, I
think, easily be reconciled. The bulk of the Snow Hill station may have
been to the north of Holborn Viaduct (the road) and/or the main surface
level entrance was located there, but there was access from Holborn
Viaduct (high level) station. Or perhaps that access (i.e. the stairway
you speak of) was added later, maybe when Snow Hill was renamed Holborn
Viaduct Low-level.

I though I had read of the existance of a Holborn Viaduct Low-level
station but couldn't remember. The very name sounds slightly ridiculous
- a station name that contains both the phrase *low-level* + *viaduct*
- but then one must remember that the viaduct in question is of course
Holborn Viaduct (the road), not the railway viaduct.