difficult to gain full and exact information respecting the lives and
habits of these little birds, which are extremely wild by nature,
disclaiming all domestic attachments, and haunting heaths and commons,
far from the resorts of man. They are very fond of water, and are never
known to abound but near vast pools or rivers. They form their nests in
a manner totally different from the varieties I have mentioned; boring a
round hole in the sand, in a serpenting direction, and about two feet
deep. At the further end of this burrow, they form their rude nest;
consisting of fine grass and feathers, laid together with very little
art. It is wonderful to observe what arduous undertakings perseverance
will accomplish. One would suppose it almost impossible that this
feeble bird, with its soft bill and tender claws, should be able to bore
a stubborn sand-bank, without injury. Sand-martins are much smaller
than any other species of _hirundines_, and also differ from them in
colour, being what is termed mouse-colour, instead of black. They fly
also in a peculiar manner, by jerks, somewhat resembling a butterfly.
They are by no means so common as the other species; for there are few
towns or large villages that do not abound with house-martins; few
churches, towers, or steeples, but what are haunted by swifts; scarcely
a cottage chimney that has not its swallow; whilst the bank-martins,
scattered here and there, live a sequestered life, in sand-hills and in
the banks of rivers."

_Ferdinand_. Do they sing, mamma?

_Mrs. B._ No, my dear; they are particularly mute, only making a little
harsh noise when any person approaches their nest. They lay from four
to six white eggs, and breed twice in the season.

_Louisa_. Have you any thing more to tell us on this amusing subject,