"A smooth round pillar to hold up a porch is a cylinder; my walking-cane is a cylinder; so is the straight body of a tree. When these are of the same size all through their whole length, they are perfect cylinders; and any thing in that shape is a cylinder." "We understand you, Uncle Philip; a gun-barrel is a cylinder, and there is a cylinder in your garden." "What is it?" "The heavy stone roller that you let us pull over the walks." [Illustration: Baltimore Starling, and Nest.] "Right. Well, this nest was like a cylinder, about five inches across, and seven inches long. At the top the bird had worked a level cover, so as to leave a hole only two inches and a half across; at the bottom it was round. It was made of flax, tow, hemp, hair, and wool, and was woven into a complete cloth; it was also tightly sewed through and through with long horse-hairs, some of which when drawn out measured two feet. Here is a picture of this nest. In the bottom it had bunches of cows' hair, and these were also sewed down with horse-hairs. This bird, boys, is a thief." "A thief, Uncle Philip! What does it steal?" "When I say it is a thief, boys, I mean that it takes what does not belong to it: but it is not a thief as man is. When a man takes something which belongs to another person, he _knows_ that it is not his; and therefore he steals: but the poor bird does not know, and that makes a difference. You asked me what it steals: I will tell you. At the time for building its nest, it will take whatever suits for that purpose; and therefore the country women are obliged to watch their thread that they have put out to bleach: the farmer, too, who has cut off young grafts from his fruit-trees and tied them up in bundles, must be careful, or the bird will pull at the string till he gets it off; and sometimes, when the bunch is not too large, he will fly off with the whole. In autumn, when the leaves have fallen, you may sometimes see skeins of silk and hanks of thread hanging about the starling's nest, but so woven up and entangled in it that they are good for nothing. Now, boys, before this country was settled by people from Europe, where do you suppose the starling got silk and thread for his nest?" "Why, Uncle Philip, are you sure he got them at all?" "A very sensible question, boys. When you are asked _why_ a thing is so, it is always well, first to be satisfied that it is so, before you begin to look for a reason. I have read a story about this very thing: would you like to hear it?" "Oh yes, Uncle Philip."