Classic Poem

Square — Implement OF Proof .

And who is this, — grave, reverend man, — who brings
With high command THE S QUARE ! whose practiced eye
Takes warily in the length and breadth and depth
Of the offered stone! how, with this implement,
He proves the angles, tests the corners each,
Sternly rejects the ashlar reprobate,
Cheerful accepts if, to his scrupulous care,
The block responds! not strange, if in the shock
Of earthquakes and the jarring elements
This wall, built up with such precision, stands!