At Knole Park, in Kent, advantage has been taken of this spreading habit to allow the formation of a very remarkable grove. The parent tree was described by Loudon as covering a quarter of an acre in 1820; the boughs have drooped so as to root themselves, and have risen again, forming trees 80 and 90 feet high, which in their turn have repeated the process, forming a second circle of trees 20 to 40 feet high, and these again are engaged in forming a third concentric circle, the total diameter of the grove, all connected with the central stem, being 36 yards. The great lime at Gordon Castle, known as the Duchess's Tree, has behaved in a similar way; but, as the supplementary growths have not been trained into trees as at Knole, the whole forms a dense thicket, impenetrable save where a passage has been kept clear to the interior. A tree of this description covers almost enough ground, if not for a small holding, at least for an allotment, for the total circumference of this mass of branches is 480 feet or 160 yards. It is as an avenue tree that the lime is seen at its best, disputing pre-eminence for that purpose with the beech. Moreover, although the beech must be accounted the more beautiful tree, its rival has advantage over it in the delicious fragrance of its blossom, which is produced in great profusion, powerfully attractive to bees. Strange to say, although the fragrant flowers are of a pale yellowish, greenish white, the honey extracted from them is deep brown, darker than heather honey, and of inferior flavour. Fine avenues of limes are innumerable in Britain, many of them being over 200 years old. At Newhouse Park, Devon, Mr. Elwes describes a remarkable one, which was planted about 200 years ago as an approach to a house which never was built. The rows are only 20 feet apart, and the trees, which are only 10 feet apart in the rows, have risen to an immense height, averaging over 120 feet. Among other notable lime avenues may be noted those at Stratton Park, Hants (Lord Northbrook's); Cassiobury, Herts (Lord Essex's), said to have been planted by Le Notre, the designer of the gardens at Versailles; at Braxted Park, Essex (Mr. Du Cane's), composed of three rows on each side; at Wollaton Hall, Notts, and Birdsall, Yorks (both places belonging to Lord Middleton). In all these avenues the trees range from 120 to 130 feet high; but none can compete in length with an avenue planted at Clumber by the Duke of Newcastle in 1840, which is only 200 yards short of two miles long. Unfortunately, these trees were planted far too wide apart in the rows, 31 feet from tree to tree, and, having been afterwards neglected in the matter of training, have squandered their luxuriance in bushy growth. To form a fine avenue timely pruning is indispensable.