W. H. K.

_Swallows' Nests._--

"... That wond'rous stone, which the swallow,

Brings from the shore of the sea to restore the sight of its

fledglings;

Lucky was he who found that stone in the nest of the swallow!"

Longfellow's _Evangeline_, Part I. i.

May I ask for information respecting the allusion contained in these

lines?