For those who thought that the two circular London Underground diagrams I featured earlier this year — by Jonny Fisher and Maxwell Roberts — were a completely modern twist on an old classic, here’s a reminder of just how forward-thinking Harry Beck really was.

This is a sketch, dated to 1964 at the earliest (due to his adoption of Paul Garbutt’s dot-in-a-circle device for main line interchange stations), that presents the Circle Line as a perfect ellipse. Quite a stunning contrast to his usual rigidly rectilinear diagrams, if perhaps ultimately not a huge improvement — much as the two modern maps are exercises in design, rather than a replacement for the original. Note also that this beautiful sketch is entirely hand-drawn: not a computer to be seen in it’s creation.

Source: Scanned from my personal copy of Mr. Beck’s Diagram by Ken Garland, Capital Transport Publishing, 1994)