THOREAU'S (Henry D.) Walden; Or, Life in the Woods. 1 vol. 16mo. $1.25.

—— A Week on the Concord and Merrimac Rivers. 1 vol. 12mo. $1.50.

—— Excursions in Field and Forest. With Portrait. 12mo. $1.25.

TICKNOR'S (George) History of Spanish Literature. New and Revised Edition. 3 vols. 12mo. $5.00.

—— Life of William Hickling Prescott. 1 vol. Nearly Ready.

TRELAWNY'S (E. J.) Recollections of the Last Days of Shelley and Byron. 1 vol. 16mo. 75 cts.

TUCKERMAN'S (Henry Theodore) Poems. 1 vol. 16mo. 75 cts.

TOCQUEVILLE'S (Alexis de) Memoirs, Letters, and Remains. Translated From the French of Gustave de Beaumont. 2 vols. 16mo. $2.50.

TYNDALL'S (Prof. John, F. R. S.) The Glaciers of the Alps. Being a Narrative of Excursions and Ascents, an Account of the Origin and Phenomena of Glaciers, and an Exposition of the Physical Principles to which they are related. With numerous Illustrations. 1 vol. 12mo. $1.50.

UPHAM'S (Hon. Charles W.) Life, Explorations, and Public Services of John C. Frémont. With Portrait and Illustrations. 1 vol 16mo. 75 cts.