an object of your publications, you will not omit to mention common salad-oil as a sovereign remedy against the bite of the viper. As to the blind-worm (Anguis fragilis, so called because it snaps in sunder with a sinall blow), I have found on examination that it is perfectly innocuous. A neighbouring yeoman (to whom I am indebted for some good hints) killed and opened a female viper about the 27th of May; he found her filled with a chain of eleven eggs, about the size of those of a blackbird; but none of them were advanced so far towards a state of maturity as to contain any rudiments of young. Though they are oviparous, yet they are viviparous also, hatching their young within their bellies, and then bringing them forth. Whereas snakes lay chains of eggs every summer in my melon-beds, in spite of all that my people can do to prevent them; which eggs do not hatch till the spring following, as I have often experienced. Several intelligent folks assure me that they have seen the viper open her mouth and admit her helpless young down her throat on sudden surprises, just as the female opossum does her brood into the pouch under her belly, upon the like emergencies; and yet the London viper-catchers insist on it, to Mr. Barrington, that no such thing ever happens. The serpent kind eat, I believe, but once in a year; or, rather, but only just at one season of the year. Country people talk much of a water-snake, but, I am pretty sure, without any reason; for the common snake (Coluber natrix) delights much to sport in the water, perhaps with a view to procure frogs and other food.

I cannot well guess how you are to make out your twelve species of reptiles, unless it be the various species, or rather varieties, of our Lacerti, of which Ray enumerates five. I have not had opportunity of ascertaining these; but remember well to have seen, formerly, several beautiful green Lacerti on the sunny sandbanks near Farnham, in Surrey; and Ray admits there are such in Ireland.

SELBORNE, June 18, 1768.

LETTER XVIII.

TO THOMAS PENNANT, ESQ.

I RECEIVED your obliging and communicative letter of June the 28th, while I was on a visit at a gentleman's house, where I had neither books to turn to nor leisure to sit down to return you an answer to many queries, which I wanted to resolve in the best manner that I am able.

A person, by my order, has searched our brooks, but could find no such fish as the Gasterosteus pungitius: he found the Gasterosteus aculeatus in plenty. This morning, in a basket, I packed a little earthen pot full of wet moss, and in it some sticklebacks, male and female; the females big with spawn: some lamperns; some bullheads; but I could procure no minnows. This basket will be in Fleet Street by eight this evening; so I hope Mazel 1 will have them fresh and fair to-morrow morning. I gave some directions in a letter to what particulars the engraver should be attentive.

Finding, while I was on a visit, that I was within a reasonable distance of Ambresbury, I sent a servant over to that town, and procured several living specimens of loaches, which he brought, safe and brisk, in a glass decanter. They were taken in the gullies that were cut for watering the meadows. From these fishes (which measured from two to four inches in length) I took the following description :-"The loach, in its general aspect, has a pellucid appearance; its back is mottled with irregular collections of small black dots, not reaching much below the linea lateralis, as are the back and tail fins a black line runs from each eye down to the nose; its belly is of a silvery white; the upper jaw projects beyond the lower, and is surrounded with six feelers, three on each side; its pectoral fins are large, its ventral much smaller; the fin behind its anus small; 1 Mr. Peter Mazel was the engraver of Pennant's plates.

its dorsal fin large, containing eight spines; its tail, where it joins to the tail-fin, remarkably broad, without any taperness, so as to be characteristic of this genus: the tail-fin is broad, and square at the end. From the breadth and muscular strength of the tail it appears to be an active nimble fish."

In my visit I was not very far from Hungerford, and did not forget to make some inquiries concerning the wonderful method.

of curing cancers by means of toads. Several intelligent persons, both gentry and clergy, do, I find, give a great deal of credit to what was asserted in the papers; and I myself dined with a clergyman who seemed to be persuaded that what is related is matter of fact; but when I came to attend to his account, I thought I discerned circumstances which did not a little invalidate the woman's story of the manner in which she came by her skill. She says of herself: "that labouring under a

virulent cancer, she went to some church where there was a vast crowd on going into a pew, she was accosted by a strange clergyman; who, after expressing compassion for her situation, told her that if she would make such an application of living toads as is mentioned she would be well." Now is it likely that this unknown gentleman should express so much tenderness for this single sufferer, and not feel any for the many thousands that daily languish under this terrible disorder? Would he not have made use of this invaluable nostrum for his own emolument ; or, at least, by some means of publication or other, have found a method of making it public for the good of mankind? In short, this woman (as it appears to me) having set up for a cancerdoctress, finds it expedient to amuse the country with this dark and mysterious relation.

The water-eft has not, that I can discern, the least appearance of any gills; for want of which it is continually rising to the surface of the water to take in fresh air. I opened a big-bellied one indeed, and found it full of spawn. Not that this circumstance at all invalidates the assertion that they are larvæ; for the larvæ of insects are full of eggs, which they exclude the instant they enter their last state. The water-eft is continually climbing over the brims of the vessel within which we keep it in water, and wandering away; and people every summer sce numbers crawling out of the pools where they are hatched, up the dry banks. There are varieties of them, differing in colour; and some have fins up their tail and back, and some have not.

SELBORNE, July 27, 1768.

LETTER XIX.

TO THOMAS PENNANT, ESQ.

I HAVE now, past dispute, made out three distinct species of the willow-wrens (Motacilla trochili) which constantly and invariably use distinct notes; but, at the same time, I am obliged to confess that I know nothing of your willow-lark. In my letter of April the 18th, I had told you peremptorily that I

knew your willow-lark, but had not seen it then: but when I came to procure it, it proved, in all respects, a very Motacilla trochilus; only that it is a size larger than the other two, and the yellow-green of the whole upper part of the body is more

1 Brit. Zool., edit. 1776, octavo, p. 381.

* Hedge-warbler, (sce Letter XXVI.): Sylvia loquax, black legs; Sylvia trochilus, yellowish belly; Sylvia sibilatrix, white belly.