Read.

Martin knew it was autumn again, for Dog ran into the house bringing wind and frost and a smell of apples turned to cider under trees. In dark clock-springs of hair, Dog fetched goldenrod, dust of farewell-summer, acorn-husk, hair of squirrel, feather of departed robin, sawdust from fresh-cut cordwood, and leaves like charcoals shaken from a blaze of maple trees. Dog jumped. Showers of brittle fern, blackberry vine, marsh-grass sprang over the bed where Martin shouted.  No doubt, no doubt of it at all, this incredible beast was October!

“Here, boy, here!”

And Dog settled to warm Martin’s body with all the bonfires and subtle burnings of the season, to fill the room with soft or heavy, wet or dry odors of far-traveling. In spring, he smelled of lilac, iris, lawn-mowered grass; in summer, ice cream-mustached, he came pungent with firecracker, Roman candle, pinwheel, baked by the sun. But autumn! Autumn!

“Dog, what’s it like outside?”

And lying there, Dog told as he always told. Lying there, Martin found autumn as in the old days before sickness bleached him white on his bed. Here was his contact, his carry-all, the quick-moving part of himself he sent with a yell to run and return, circle and scent, collect and deliver the time and texture of worlds in town, country, by creek, river, lake, down-cellar, up-attic, in closet or coal-bin. Ten dozen times a day he was gifted with sunflower seed, cinder-path, milkweed, horse-chestnut, or full flame-smell of pumpkin. Through the loomings of the universe Dog shuttled; the design was hid in his pelt. Put out your hand, it was there. . . .

“And where did you go this morning?”

But he knew without hearing where Dog had rattled down hills where autumn lay in cereal crispness, where children lay in funeral pyres, in rustling heaps, the leaf-buried but watchful dead, as Dog and the world blew by. Martin trembled his fingers, searched the thick fur, read the long journey. Through stubbled fields, over glitters of ravine creek, down marbled spread of cemetery yard, into woods. In the great season of spices and rare incense, now Martin ran through his emissary, around, about, and home!

The bedroom door opened ...

Ray Bradbury, from "The Emissary"