On what trees he cuts the notches of the passing days I do not know, but surely the horned owl’s almanac is as reliable as the Old Farmer’s, and he knows the nearness of the spring. I dare say the other birds which winter with us know it too, though not being so big and husky they do not venture to give hostages to the enemy quite so early in the season. The barred owls will build in late March, and soon after April fool’s day the woodcock will be stealing north and placing queer, pointed, blotched eggs in some little hollow just above high water in the swamp. The crows are cannier still. You will hardly find eggs in their nests hereabouts before the fifteenth of April, and you will do well to postpone your hunting till the twenty-fifth. Yet they all know, as well as I do, when the spring is near, and I think I have the secret of the message which has come to them. It is not the fact that a south wind has blown, for this may happen at any time during the winter, but it is something that reaches them on the wings of this same south wind. This night on which the horned owl of Pigeon Swamp brooded her eggs so carefully was lighted by the moon, but toward midnight a purple blackness grew up all about the still sky and blotted out all things in a velvety smear that sent even Bubo to perch beside his mate. There was then no breath of wind. The faint air from the north that had brought the deep chill had faltered and died, leaving its temperature behind it over all the fields and forest. The air stung and the ground rang like tempered steel beneath the foot, yet you had but to listen or breathe deep to know what was coming. The stroke of twelve from the distant steeple brought a resonance of romance along the clear miles and the air left in your nostrils a quality that never winter air had a right to hold. To one who knows the temper of the open field and the forest by day and night the promise was unmistakable, though so subtle as to be difficult to define. Whether it was sound or smell or both I knew then that a south wind was coming, bearing on its balmy breath those spicy, amorous odors of the tropics that come to our frozen land only when spring is on the way. The goddess scatters perfumes from her garments as she comes and the south wind catches them and bears them to us in advance of her footsteps. You may sniff these same odors of March far offshore along the West Indies,--spicy, intoxicating scents, borne from the hearts of tropic wild-flowers and floating off to sea on every breeze.