His Art of Preserving Health is the only production by which he is likely to be remembered. The theme which he has chosen is one, in which no man who lives long does not at some time or other feel an interest; and he has handled it with considerable skill. In the first Book, on Air, he has interwoven very pleasing descriptions both of particular places and of situations in general, with reference to the effects they may be supposed to have on health. The second, which treats of Diet, is necessarily less attractive, as the topic is less susceptible of ornament; yet in speaking of water, he has contrived to embellish it by some lines, which are, perhaps, the finest in the poem. Now come, ye Naiads, to the fountains lead; Now let me wander through your gelid reign. I burn to view th' enthusiastic wilds By mortals else untrod. I hear the din Of waters thund'ring o'er the ruin'd cliffs. With holy reverence I approach the rocks Whence glide the streams renown'd in ancient song. Here from the desart, down the rumbling steep, First springs the Nile: here bursts the sounding Po In angry waves: Euphrates hence devolves A mighty flood to water half the East: And there, in Gothic solitude reclin'd, The cheerless Tanais pours his hoary urn. What solemn twilight! What stupendous shades Enwrap these infant floods! Through every nerve A sacred horror thrills, a pleasing fear Glides o'er my frame. The forest deepens round; And more gigantic still th' impending trees Stretch their extravagant arms athwart the gloom. Are these the confines of another world? A land of Genii? Say, beyond these wilds What unknown regions? If indeed beyond Aught habitable lies. This has more majesty, and more to fill the imagination, than the corresponding paragraph in Thomson's Autumn. Say then where lurk the vast eternal springs, &c.--771. Yet it is inferior in beauty to some verses in a Latin poem by a writer who is now living. Quippe sub immensis terrae penetralibus altae Hiscunt in vastum tenebrae: magnarum ibi princeps labitur undarum Oceanus, quo patre liquoris Omnigeni latices et mollis lentor aquai Profluxere, nova nantes aestate superne Aerii rores nebularum, et liquidus imber. Fama est perpetuos illinc se erumpere fontes, Florigerum Ladona, et lubrica vitra Selemni, Crathidaque, imbriferamque Lycaeis vallibus Hagno, Et gelidam Panopin et Peirenen lacrymosam, Illinc et rapido amnes fluere et mare magnum. In the third book, he once more breathes freely, and in recounting the various kinds of exercise by which the human frame may be invigorated, his poetic faculty again finds room to play. Joseph Warton, in his Essay on Pope, has justly commended the Episode on the Sweating Sickness, with which it concludes. In the fourth and last, on the Passions, he seems to have grown weary of his task; for he has here less compression and less dignity.