Nor is this world so difficult to enter as it seems at first. Science--whose help is needed--has, to be sure, shrouded itself in technicalities, buried its facts under scientific terms, and hidden its names in a dead language. But all this, which perhaps was necessary, can be got over. With a little courage, and some perseverance, this bristling array of difficulties may be broken through, and the charming goldfinch be as lovely and bewitching under the name of Spinus tristis, as of thistle bird, or yellow bird. How shall we go to work? This is the first question always. Let me give you a few hints: Some fine morning dress yourself in modest-hued array, dull olive of medium shade best; discard all conspicuous details of costume; take off ribbons and veils, and all fluttering things; reject the spring hat with its eccentricities of flowers, fruits, feathers, or general fluffiness, and put on a plain shade hat, as near the color of the dress as possible; leave parasol, bag or basket and book all at home. Slip into a flat pocket on the outside of your gown or coat, a small note book with sharpened pencil attached to it, and suspend by narrow ribbon around the neck, so that it will hang above the waist and be ready for instant use, an opera glass without its case. On your left arm carry a light folding camp stool--and start out. Bid adieu to your friends, and go alone, for the temple of Nature can never be entered in crowds, nor even in pairs. Turn your steps to the best place you know of; an old orchard, a grove with underbrush near a house, a ravine, a swamp, or the edge of woods. Walk slowly and leisurely along, with little noise of footsteps, and without swinging arms. Arrived in your chosen spot look sharply around for the flitting forms of the birds. When you see one, stop at once; quietly slip your stool off your arm and sit upon it, with as little motion as possible. If you place it against a tree trunk, to furnish a back, you can be comfortable in that one position an hour without moving. Now slowly raise your opera glass to your eyes, adjust the focus to bring the bird clearly before you, and proceed to study him. First you want his description so that you can name him. Look very carefully at him, his size and shape, his coloring above and below, his peculiar markings, the shape of his tail at the end, and the color and shape of the beak. As you settle one point write it in your note book, which you have quietly drawn out of its pocket.