When the States-General were at war with Spain, Brower started on a visit to Antwerp, whither his reputation had already proceeded him. Omitting to provide himself with a passport, he was arrested as a spy, and confined in the citadel, where the Duke d'Aremberg was imprisoned. That nobleman lived in friendship with Rubens, who often visited him in his confinement; and the Duke, having observed the genius of Brower, desired Rubens to bring a palette and pencils, which he gave to Brower, and the latter soon produced a representation of Soldiers playing at Cards, which he designed from a group he had seen from his prison window. The Duke showed the picture to Rubens, who immediately exclaimed that it was by the celebrated Brower, whose pictures he often admired; and he offered the Duke six hundred guilders for the work, but the latter refused to part with it, and presented the artist with a much larger sum. Rubens lost no time in procuring his liberty, which he did by becoming his surety, took him into his own house, and treated him with the greatest kindness.