Keats hailed autumn as the "season of mists and mellow fruitfulness," while Shakespeare found in the season a metaphor for his own aging ("That time of year thou mayst in me behold/ When yellow leaves, or none, or few do hang/ Upon these boughs which shake against the cold . . .") Name the authors and titles of the four poems from which the following autumnal lines are taken: (1) "While Autumn, nodding o'er the yellow plain, Comes jovial on." (2) "The skies they were ashen and sober; The leaves they were crispe`d and sere . . ." (3) "No spring, nor summer beauty hath such grace, As I have seen in one autumnal face." (4) "I praise the flower-barren fields, the clouds, the tall Unanswering branches where the wind makes sullen noise.

I praise the fall: it is the human season."

All entries (one per person) must be clearly written on postcards and mailed to: Book Bag, The Washington Post, Washington, D.C. 20071, and must include complete return address and competition number. The winning entry will be the first correct answer drawn at random. Employees of The Washington Post Company and their families are not eligible to enter. Entries must be received no later than Dec. 6. The winner's name and city of residence will be announced in the Dec. 16 issue. A Washington Post Book World book bag will be sent to the winner.

Answer to Book Bag #600: The authors of the well-known quotations containing the word "child" are: (1)Edgar Allan Poe, (2) Walt Whitman, (3) William Wordsworth,(4) Samuel Taylor Coleridge, and (5) John Donne.

Winner: Jessie Schlotthauer (age 15), Arlington, Va.