We have long wished to present this biography of one of nature's noblemen, and the greatest writer on the topics of horticulture, to the American public. By dividing it into three numbers, we trench but little on the ground devoted to our correspondents, who will, we are confident, pardon a little delay for the pleasure of perusing this very graceful "story of a life".

In many respects, Mr. Loudon resembled our own Downing; the same enthusiasm and love of horticulture, the some indifference for mere money matters, and indomitable perseverance in writing, when other affairs pressed for attention, mark the career of each. Mr. Downing, however, entered more thoroughly into descriptions of the pleasures of the mind; Mr. Loudon was engaged in the useful. The account of his sufferings, and the curious circumstance of his writing his greatest works, with his left hand, and that seriously mutilated, are entirely novel in the whole history of literary effort. This life, which appeared in a posthumous edition of his Instructions far Gardeners, has never before been printed in America.

Mr. London's works are still standards, and continue to be extensively sold, more especially his Arboretum Britannicum, which was the, cause: of his pecuniary ruin, and his Encyclopedia of Plants, to which a supplement has just been issued, bringing down this most laborious and invaluable. work to the present.day..