The only time, by Sinclair Beiles

They might have been twins.
they looked exactly like each other
and they sat facing each other
in the underground.
Each of them was hesitant to speak
to the other.
But when one got off, the other
followed him and saw him disappear
into the side entrance of a bank.
He obviously worked in a bank
like the man who had taken the trouble
to follow him. That was the only time
they saw each other.

(Published in The Idiot's Voice, Cold Turkey Press, France, 2012)