Keep It Simple (third draft)

He sees fluid swaying in a semicircle
and his balance is the bubble in a spirit level.
Anvil, oval window, stirrup -
cityscape of minute parts - he doesn't want to know.
Choosing the Tube map he journeys,
connects, anticipates snafus:
the lungs of the Northern line,
cradling the ruddy pump of Holborn,
as clean and clear as
Metropolitan nostrils.
The right foot of Heathrow Terminals
shoots scores of planes a day.
Slowly, steadily, he teases Operation
from the pile of childhood games.