In this painting, two men wearing tunics kneel next to a rocky crag, past which, in the distance, a stormy landscape opens up. The elder of the two men bends over a sheaf of papers on which he writes, using the surface of a rock as a desk. The other man points his right index finger to a page, while his other hand and his feverish gaze are directed heavenward. The younger of the two is the evangel