"It's getting too cold for the little fellows," says the wiseacre, who sees you watching the smaller birds as they pass southward. Is it, though? What of the tiny winter wren which spends the zero weather with us? His coat is no warmer than those birds which have gone to the far tropics. And what of the flocks of birds which we occasionally come across in mid-winter, of species which generally migrate to Brazil? It is not the cold which deprives us of our summer friends, or at least the great majority of them; it is the decrease in food supply. Insects disappear, and only those birds which feed on seeds and buds, or are able to glean an insect diet from the crevices of fence and tree-trunk, can abide. This is the month to climb out on the roof of your house, lie on your back and listen. He is a stolid person indeed who is not moved by the chirps and twitters which come down through the darkness. There is no better way to show what a wonderful power sound has upon our memories. There sounds a robin's note, and spring seems here again; through the night comes a white-throat's chirp, and we see again the fog-dimmed fields of a Nova Scotian upland; a sandpiper "peets" and the scene in our mind's eye as instantly changes, and so on. What a revelation if we could see as in daylight for a few moments! The sky would be pitted with thousands and thousands of birds flying from a few hundred yards to as high as one or two miles above the earth. It only adds to the interest of this phenomenon when we turn to our learned books on birds for an explanation of the origin of migration, the whence and whither of the long journeys by day and night, and find--no certain answer! This is one of the greatest of the many mysteries of the natural world, of which little is known, although much is guessed, and the bright September nights may reveal to us--we know not what undiscovered facts. I see my way as birds their trackless way. I shall arrive; what time, what circuit first, I ask not; but unless God sends his hail Of blinding fire-balls, sleet or driving snow, In sometime, his good time, I shall arrive; He guides me and the bird. In his good time. Robert Browning. GHOSTS OF THE EARTH We may know the name of every tree near our home; we may recognise each blossom in the field, every weed by the wayside; yet we should be astonished to be told that there are hundreds of plants--many of them of exquisite beauty--which we have overlooked in very sight of our doorstep. What of the green film which is drawn over every moist tree-trunk or shaded wall, or of the emerald film which coats the water of the pond's edge? Or the gray lichens painting the rocks and logs, toning down the shingles; the toadstools which, like pale vegetable ghosts, spring up in a night from the turf; or the sombre puff balls which seem dead from their birth?