The seat of the late Judge Peters, about five miles from Philadelphia, was, 30 years ago, a noted specimen of the ancient school of landscape gardening. Its proprietor had a most extended reputation as a scientific agriculturist, and his place was also no less remarkable for the design and culture of its pleasure-grounds, than for the excellence of its farm. Long and stately avenues, with vistas terminated by obelisks, a garden adorned with marble vases, busts, and statues, and pleasure grounds filled with the rarest trees and shrubs, were conspicuous features here. Some of the latter are now so remarkable as to attract strongly the attention of the visitor. Among them, is the chestnut planted by Washington, which produces the largest and finest fruit; very large hollies; and a curious old box-tree much higher than the mansion near which it stands. But the most striking feature now, is the still remaining grand old avenue of hemlocks (Abies canadensis). Many of these trees, which were planted 100 years ago, are now venerable specimens, ninety feet high, whose huge trunks and wide spread branches are in many cases densely wreathed and draped with masses of English Ivy, forming the most picturesque sylvan objects we ever beheld.