When the frost hath continued long, and hard, that you begin to suspect your fish, you may make a trial by cutting holes in several places, some in the middle, and some by the sides of the waters that are obnoxious; that is, after about ten days freezing; and by the appearing of the fish, or not, you shall discover the temper and condition they are in; therefore watch them diligently. If they are not well, they will appear; then prepare all hands to take out every fish, as near as you can; for what you take out, you may preserve, and all that are left behind, are probably lost.

Many use to break holes to relieve the fish, and, as they think, give them fresh air; some have put dung bound up together into the holes, as if the warmth of that keeping the hole open would preserve the fish; but these ways, and all others that I have heard of, except taking out the fish, are mere vanities. I have cut many holes, and large ones, and employed men to take out the ice, and keep them open, but to no advantage. One thing appeared very oddly to me, when I took that course. Many of the fish in a large moat had gathered together in a corner obverted to the South, where the ground rose under an high bank, to a shoal-water. These fish, by their motion and heat, together with the sun’s heat, that was strongest there, kept the water from freezing, and I could plainly see every fish, great and small. There were carp, pike, perch, eels, and fry in abundance, collected as if it had been a general counsel of all the orders of fish, met to consider what was to be done in that extremity, very diverting to observe.

But to leave conceits, and come to the only expedient which I have found effectual to save the fish in this case; and that is, to set great tubs or fats full of water in some outhouse, not far from a fire; and as fast as the fish appear, take them out, and put them there; and from thence you may convey them in a basket to your great waters, where you may make an hole at about eight feet deep, and putting the fish in, preserve them; or if you please, you may keep them there, freshening the water every twelve hours, until the frost breaks, and put them into their own houses again. You may plainly perceive how the fish, though stunned and numb with the frost, coming into the fat, will by degrees recover, and be perfectly well again; and thus you may keep them five weeks, or longer, if the frost continues.

I have gone farther: sometimes fish have been to all appearance dead, others frozen and inveloped in ice, yet by this method I have preserved them; for heating water, and putting it into the fat, until I brought the water there to a Midsummer heat, and then I have put such fish in, with their shell of ice upon them, and in six or seven hours the ice was gone, and the fish alive and well; and so I have delivered them to my great waters, brisk as any.

This may seem strange, but it is most true, and to be attested, if need were; therefore in frost use this and no other means, for all else will prove but labour in vain.

In small waters, where is the greatest danger of frost, observe never to put in stock, but the last week of February, or beginning of March; for then they take less hurt in removing, and they may be taken out in October after, and so all hazard of frost prevented; and if you venture them there one winter, be sure never let them run the hazard of another. So you have two summers feed, which will raise a carp from store to the table, and venture but one winter’s frost; and in winter they neither feed nor grow any thing considerable.

Of the ordinary Benefits and Improvements by Fish.

These were touched when I spoke of disposing the increase of fish; that is, furnishing your table, obliging your friends, and raising money. I shall only add to the last, that it is most reasonable, if it can be contrived, that pleasures pay for the charge of them. Then what is more justifiable, than to make ponds yield a profit to answer the great charge in making them?

But we must go farther: ground shall be vastly improved by fish, and shall be intrinsically worth, and yield more this way, than by any other employment you can give it: for suppose it meadow of two pounds per acre (which is an high value for the best meadow far from London), I will justify, that four acres in pond shall return you every year one thousand carps fed up, from — to fourteen or fifteen inches, besides pikes, perch, and tench, and other fry, useful on many accounts, if the water suits them. The carps are saleable, and will bring perhaps twelve pence, but in all likelihood not less than nine pence; yet, let it be six pence apiece, there is twenty-five pounds, which is six pounds five shillings per acre; a little charge of carriage perhaps to be deducted. This is improvement enough.