Metropolitan Railway Company
Group From 1863 To 1933
This was the world's first underground passenger railway.
IanVisits has reproduced an Illustrated London News report on the construction of this line. Our picture is a detail off the Company's 1912 HQ in Allsop Place NW1.
Londonist have published a great piece on this historic infrastructure - they've even nailed the first piece of rude underground graffiti.