All Vermin in a Fenn are fond of a Bank; it is high Ground, and therefore dry and comfortable for them in the Winter, for which Reason they are always full of Moles, and particular Kinds of Rats and Mice, with long Noses, call'd Field Mice and Rats, and abundance more Animals, which breed incessantly; and make Holes and Burrows through the Banks in all Directions. One Kind of these Rats builds his House so commodious, that it is worth while to relate the Ingenuity of this little Free Mason: He begins by making a Hole in the Top of the Bank, and after a Labyrinth of many Windings and Turnings, he finishes all, by making another towards the Bottom of the Bank close to the Water's Edge; by that Means he extends his Territories from the Top of the Bank to the Bottom, and has a Supply of fresh Water, without being seen by the Enemy, who is continually upon the Watch for him. Owls, Buzzards, Kites, Ravens, Carrion Crows, and other Birds of Prey in the Fenn, always frequent the Banks in the Evening, and if the Grass is kept low by Cattle, they will destroy most of the Vermin upon them. But then we must not plant Trees upon them, as they will be the finest Cover imaginable for those Rats; Trees will not only hide them from the Sight of the Birds of Prey, but will likewise hinder those Birds from darting down upon them when they have got a Sight of them. I remember, near eighteen Years ago, several Sorts of Aquatics were planted upon the Banks in the Fenns near Thorney-Abbey; the Consequence was, the Roots of the Trees served for Timber for the Houses of these Vermin, and the Branches were a Shelter from the Birds of Prey, by which Means they were full of Holes, thro' which the Water used to run back again to the Lands as fast as the Engines threw it out; for which Reason the Trees were ordered to be grubbed up, by the principal Engineer. There is nothing which strengthens a Bank like a good Covering of Grass, close eat by Cattle; for if once Water penetrates through the outside Coat of a Bank, it is not in the Power of Aquatics to hinder it from tearing the Earth away with it. If Aquatics are planted any where, they ought to be at some Distance _before_ the Bank, in order to keep the Lash of Water from wearing it away. * * * * * XXX. _That those who lived Two Thousand Years ago, were larger than the present Race of Mankind._