In message
,
lonelytraveller writes

But if you look at the map, there's a fifth shaft, out of line from
the others. Wouldn't that be right on top of the tracks?

Don't forget that the line ended at Bank in 1902. The Liverpool Street
extension didn't open until 1912 (and I think it skirts a bit to the
south, passing under the Royal Exchange to avoid the vaults of the Bank
of England).
--
Paul Terry