a female during the laying-time. If more than one was come down out of the ovary, and advanced to a good size, doubtless then she would that spring lay more than one.
I will endeavour to get a hen, and to examine.
Your supposition that there may be some natural obstruction in singing birds while they are mute, and that when this is removed the song recommences is new and bold; I wish you could discover some good grounds for this suspicion.
I was glad you were pleased with my specimen of the caprimulgus, or fern-owl; you were, I find, acquainted with the bird before.
When we meet, I shall be glad to have some conversation with you concerning the proposal you make of my drawing up an account of the animals in this neighbourhood. Your partiality towards my small abilities persuades you, I fear, that I am able to do more than is in my power: for it is no small undertaking for a man unsupported and alone to begin a natural history from his own autopsia! Though there is endless room for observation in the field of nature, which is boundless, yet investigation (where a man endeavours to be sure of his facts) can make but slow progress; and all that one could collect in many years would go into a very narrow compass.
Some extracts from your ingenious 'Investigations of the difference between the present temperature of the air in Italy,' etc., have fallen in my way, and gave me great satisfaction: they have removed the objections that always rose in my mind whenever I came to the passages which you quote. Surely the judicious Virgil, when writing a didactic poem for the region of Italy, could never think of describing freezing rivers, unless such severity of weather pretty frequently occurred!
P.S. Swallows appear amidst snows and frost.
