[3a] And here it is well to point out to those seeking to obtain good wood-engravings, for the illustration of works which they propose to write or publish, that there are two absurdities, about equally great, usually committed by persons in their position. The one of which is the ordering and paying liberally for the work of a clever artist and designer, and then mulcting the engraver one half the price he ought to receive, if he do his duty and spend the requisite time on the work, and wondering why the product is a wretched botch and not a fine work of art. The other is the converse of this, paying an engraver well to cut, and grudging the extra expense of a good artist. For it must be remembered, that in wood-engraving the artist and designer, where they are not one, as in the case of Bewick and a few others--and this is a rare case--must work in unity of intent, with a perfect comprehension of, and a full sympathy in, the meaning and genius each of the other. * * * * * =RIVERS.= =BY THOMAS MILNER, M. A.= (_Concluded from page 463._) Many rivers are subject to a considerable elevation of the level of their waters. This is periodical or irregular in its occurrence, according to the nature of the producing cause. Casual temporary floodings, as the effect of extraordinary rains, are common to the streams of most countries, and sometimes occasion great changes of the surface, and destruction of life and property. One of the most remarkable instances of this kind in modern times, occurred on the 4th of August, 1829, in Scotland, when the Nairn, Spey, and Findhorn rose above their natural boundaries, and spread a devastating deluge over the surrounding country. The rain which produced this flood fell chiefly on the Monadhleadh Mountains, where the rivers in question have their feeders, situated between the south of Loch Ness and the group of the Cairngorums. Sir Thomas Dick Lauder, in his interesting account of this inundation, considers the westerly winds, which prevailed for some time previously, after a season of unusual heat, to have produced a gradual accumulation of vapor, somewhere north of our island; and the column being suddenly impelled by a strong north-easterly blast, it was driven toward the south-west, till arrested in its course by the lofty mountains upon which it discharged itself in torrents perfectly unexampled. The rain fell occasionally in heavy drops, but was for the most part broken by the blast into extremely minute particles, so thick that the very air itself seemed to be descending in one mass of water upon the earth. It deluged every house whose windows were exposed to the south-east. The lesser animals, the birds, and especially game of all kinds, were destroyed in great numbers, by the rain alone; and the mother partridge, with her progeny and mate, were found chilled to death