And then they knew the perilous rock,
And blessed the Abbot of Aberbrothok.

These lines come from Robert Southey’s ballad “The Inchcape Rock,” a popular Romantic-era narrative poem based on a North Sea maritime legend. The poem recounts how an abbot of Arbroath (Aberbrothock) ordered a warning bell to be fixed on the dangerous Inchcape reef off the Scottish coast so that sailors could hear it in fog or storm. A pirate (often identified as Sir Ralph the Rover) maliciously cuts the bell away; later, in thick weather, his own ship strikes the reef and is wrecked. The quoted couplet occurs at the moment the doomed crew recognizes the reef and, too late, appreciates the abbot’s lifesaving foresight.

The couplet captures a sudden reversal from ignorance to recognition: the sailors “knew” the rock only when it is already fatal, and their blessing of the abbot is an ironic, belated gratitude. Southey uses this moment to underline the poem’s moral logic of providence and retribution: benevolent public works (the warning bell) protect the community, while spiteful sabotage rebounds upon the saboteur. The lines also emphasize how human life at sea depends on fragile signals and shared responsibility; removing a safeguard is not merely a prank but an assault on collective survival. The blessing functions as a brief, poignant tribute to altruism amid catastrophe.