Mercury 3 was a Mercury programmanned space mission launched on May 5, 1961 using a Redstone rocket.
The Mercury capsule was named "Freedom 7" and performed a suborbital flight, piloted by astronaut Alan Shepard, the first American in space.
The flight lasted 15 minutes, and the spacecraft traveled 300 miles from its launch point, ascending over 100 miles.
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Mark Lane tube station[?]
Marlborough Road tube station[?]
North End tube station[?] (aka Bull & Bush; never opened)
North Weald tube station[?]
Ongar tube ...