Note that two-handed engine at the door — MILTON’S MINOR POEMS.
Reading edition
130-131. These lines evidently denounce some terrible retribution that is sure ere long to overtake the corrupt clergy described in the preceding passage. The two-handed engine at the door, that stands ready to smite once and smite no more, has never been definitely explained. We naturally think of the headsman’s axe, which, however, does not become applicable till the execution of Archbishop Laud, an event not to take place till eight years after the composition of the poem. It has been suggested that Milton had in mind the two houses of Parliament, or the Parliament and the Army, as the agency through which reform was to be effected. We must remember that Milton in 1637 could not foresee the Civil War. He may have meant to combine certain scriptural expressions into a mysteriously suggestive and oracular prediction, without having in view any single and definite possibility.