It is a very simple garment made of three pieces,--two (straight) legs and a large square.

The square is folded like a kerchief, and the leg pieces attached to the two sloping sides.

A broad elastic and small openings on each side and at the top enable these very baggy knickerbockers to be easily pulled on for going out (where they effectually exclude cold exhalations from snow or damp ground), and pulled off on coming in.
Short of such coddling as this, I strongly urge fleecy cork socks inside your garden boots; and I may add that if you've never tried them, you can have no idea of the warmth and comfort of a pair of boy's common yellow-leather leggings, but the buttons will require some adjusting.
Of course, very robust gardeners are independent of these troublesome considerations; but the gardening members of a family, whether young or old, are very often not those vigorous people who can enjoy their fresh air at unlimited tennis or a real good stretching walk over the hills.

They are oftener those weaker vessels who have to be content with strolls, and drives, and sketching, and "pottering about the garden." Now, pottering about the garden in spring and autumn has many risks for feeble vitalities, and yet these are just the seasons when everything requires doing, and there is a good hour's work in every yard of a pet border any day.

So _verbum sap_.