Phil Roe is a London Underground employee with over 40 years of service. While working in ticket offices in the 1970s, he was worried that he was too slow in calculating fares for customers, so he drew up his own fare zone diagrams for each station he worked at. The example below is for Green Park station, and the fares are in pence! 

His maps predate the official usage of zones on the Tube Map, though Phil just says, “I don’t know where they got the idea from, but I think I was there first.”

In addition to the zones, Phil’s also added Hatton Cross (opened 1975) and Heathrow Central (opened 1977) by hand.

Source: Timeout London – lots of other astounding maps that Phil has drawn by hand here as well!