Were an artist to paint upon demand a picture of a Dryad, we will ask whether, in the present low state of expectation, the patron would not, or ought not to be fully satisfied with a beautiful naked figure recumbent under wide-stretched oaks? Disseat those woods, and place the same figure among fountains, and falls of pellucid water, and you have a--Naiad! Not so in a rough print we have seen after Julio Romano, we think--for it is long since--_there_, by no process, with mere change of scene, could the figure have reciprocated characters. Long, grotesque, fantastic, yet with a grace of her own, beautiful in convolution and distortion, linked to her connatural tree, co-twisting with its limbs her own, till both seemed either--these, animated branches; those, disanimated members--yet the animal and vegetable lives sufficiently kept distinct--_his_ Dryad lay--an approximation of two natures, which to conceive, it must be seen; analogous to, not the same with, the delicacies of Ovidian transformations. To the lowest subjects, and, to a superficial comprehension, the most barren, the Great Masters gave loftiness and fruitfulness. The large eye of genius saw in the meanness of present objects their capabilities of treatment from their relations to some grand Past or Future. How has Raphael--we must still linger about the Vatican--treated the humble craft of the ship-builder, in _his_ "Building of the Ark?" It is in that scriptural series, to which we have referred, and which, judging from some fine rough old graphic sketches of them which we possess, seem to be of a higher and more poetic grade than even the Cartoons. The dim of sight are the timid and the shrinking. There is a cowardice in modern art. As the Frenchmen, of whom Coleridge's friend made the prophetic guess at Rome, from the beard and horns of the Moses of Michael Angelo collected no inferences beyond that of a He Goat and a Cornuto; so from this subject, of mere mechanic promise, it would instinctively turn away, as from one incapable of investiture with any grandeur. The dock-yards at Woolwich would object derogatory associations. The depôt at Chatham would be the mote and the beam in its intellectual eye. But not to the nautical preparations in the ship-yards of Civita Vecchia did Raphael look for instructions, when he imagined the Building of the Vessel that was to be conservatory of the wrecks of the species of drowned mankind. In the intensity of the action, he keeps ever out of sight the meanness of the operation. There is the Patriarch, in calm forethought, and with holy prescience, giving directions. And there are his agents--the solitary but sufficient Three--hewing, sawing, every one with the might and earnestness of a Demiurgus; under some instinctive rather than technical guidance; giant-muscled; every one a Hercules, or liker to those Vulcanian Three, that in sounding caverns under Mongibello wrought in fire--Brontes, and black Steropes, and Pyracmon.