Campbell Dodgson,
Dictionary of National Biography
(1901)
“ Calderon's admirable draughtsmanship and sound technique secured the esteem of artists for his work. He probably owed much of his popularity with the general public to his choice of subjects. Most of his pictures tell a story, usually one of his own invention, sometimes a subject from history or literature. He resembled Millais in his power of representing a dramatic or pathetic incident, usually with few actors on the scene, with a simplicity which appealed at once to the intelligence and the sympathy of the crowd which frequents the Royal Academy exhibitions. ”
