These hints we think proper to throw out in order to set the inquisitive and discerning to work.
A good monography of worms would afford much entertainment and information at the same time, and would open a large and new field in natural history. Worms work most in the spring; but by no means lie torpid in the dead months: are out every mild night in the winter, as any person may be convinced that will take the pains to examine his grass-plots with a candle; are hermaphrodites, and much addicted to venery, and consequently very prolific.
LETTER XXXVI.
Dear Sir,—You cannot but remember that the 26th and 27th of last March were very hot days,—so sultry that everybody complained and were restless under those sensations to which they had not been reconciled by gradual approaches.
This sudden summer-like heat was attended by many summer coincidences; for on those two days the thermometer rose to 66° in the shade; many species of insects revived and came forth; some bees swarmed in this neighbourhood; the old tortoise, near Lewes, in Sussex, awakened and came forth out of its dormitory; and, what is most to my present purpose, many house-swallows appeared and were very alert in many places, and particularly at Chobham, in Surrey.
But as that short warm period was succeeded as well as preceded by harsh severe weather, with frequent frosts and ice, and cutting winds, the insects withdrew, the tortoise retired again into the ground, and the swallows were seen no more until the 10th April, when, the rigour of the spring abating, a softer season began to prevail.
Again; it appears by my journals for many years past that house-martins retire, to a bird, about the beginning of October;
