Flight Of Stairs

Stairs fly as straight as hawks;
Or else in spirals, curve out of curve, pausing
At a ledge to poise their wings before relaunching.
Stairs sway at the height of their flight
Like a melody in Tristan;
Or swoop to the ground with glad spread of their feathers
Before they close them.

They curiously investigate
The shells of buildings,
A hollow core,
Shell in a shell.

Useless to produce their path to infinity
Or turn it to a moral symbol,
For their flight is ambiguous, upwards or downwards as you please;
Their fountain is frozen,
Their concertina is silent.