Its one perennial charm is the swift river that flows through it, making music on its wide sandy and pebbly floor.

Hither and thither flit the wagtails, finding little half-uncovered stones in the current to perch upon.

Both the pied and grey species are there; and, seeing them together, one naturally wishes to resettle for himself the old question as to which is the prettiest and most graceful.

Now this one looks best and now that; but the delicately coloured grey and yellow bird has the longest tail and can use it more prettily.

Her tail is as much to her, both as ornament and to express emotions, as a fan to any flirtatious Spanish senora.