We, the undersigned citizens of Worcester, Mass., practical carpenters, are personally acquainted with William Brown, Esq., Architect, and author of a work, entitled the "_Carpenter's Assistant and Rural Architect_." We have examined that work with attention, and commend it to all who are interested in the study or practice of the art, as a valuable treatise on architecture, and it is eminently practical in its character. We cheerfully recommend it to the patronage of carpenters and the public. EDWARD LAMB, FREEMAN UPHAM, P.W. TAFT, J.S. WOODWORTH, M.H. MORSE, S.D. HARDING, W.R. BIGELOW, HORATIO N. TOWER. I have carefully examined the "Carpenter's Assistant and Rural Architect," and believe it to be a work well adapted to meet the wants of the practical workman, being practical in its character, and valuable for the perspicuity of its arrangement, clearness of its designs, and brevity of its explanations. I would most cheerfully recommend it to the patronage of carpenters and students. ELBRIDGE BOYDEN, Architect. Mr. BROWN: SIR,--I have examined your work on architecture, and feeling confident of its utility, from its extreme simplicity and singular adaptedness to meet the wants of the carpenters, I do cheerfully recommend it to the condition of every carpenter especially the apprentice, who will find all the rudiments of architecture necessary as well as designs for practice. A.L. BROOKS. LIVERMORE & RUDD, _Publishers_, 310 Broadway, New York. A BOOK THAT WILL MAKE ITS MARK! The undersigned have the satisfaction of announcing to the Public and the Trade that they have just published an original work of fiction of unusual interest and merit, by an American author, entitled, ASPENWOLD. The claims of this work to a high place in the front rank of our national literature will be admitted by every reader whose critical abilities enable him to appreciate authorial excellence. It is written in the form of an autobiography, like the works of MARRYATT, and will favorably compare with the best of that popular writer's productions. It is free from the hackneyed incidents which comprise the principal stock in trade of most of our modern novelists, and is emphatically A FRESH BOOK in the ripest sense of that much-abused term. For its strength and naturalness of description, the reader will be reminded of COOPER; in the flowing style of its narrative, of MARRYAT; in the earnestness of its thought and diction, of CURRER BELL; and in the completeness of its characters, of CHARLES DICKENS. The power and originality of the work will ensure it a wide sale, and secure a popularity for its author enjoyed by few. Embellished with a beautiful Frontispiece. 408 Pages, 12mo, Cloth, Price $1.25. LIVERMORE & RUDD, _Publishers_, 310 BROADWAY, NEW YORK. DESIRABLE ILLUSTRATED BOOKS FOR CHILDREN. BOUND IN BOARDS, RED CLOTH BACKS. UNCLE THOMAS'S STORIES FOR GOOD CHILDREN. Square 16mo, 72 Pages each, put up in Packages of 12, $1 50.