The Aeneid by Virgil Book 4 Page 21

counsel; he calls Mnestheus and Sergestus, bidding them make ready the fleet in silence, gather the crews to the shore, and order the armament, but hide the cause of his altered plans. He meanwhile, since gracious Dido knows nothing, nor expects the breaking of so strong a love, will essay an approach and seek the happiest season for speech, the plan auspicious for his purpose. At once all gladly obey his command and do his bidding.

But the queen – who may deceive a lover?

– divined his guile, and early caught news of the coming stir, fearful even when all was safe. The same heartless Rumour brought her the maddening news that they are arming the fleet and making ready for sailing. Helpless in mind she rages, and all aflame raves through the city, like some Thyiad startled by