buildings, and upon the fitness of various kinds of walls for the necessities of our discipline; and authorized the construction of a model prison, upon which were lavished the best science and art within reach of the commissioners; and the result was naturally an improvement in the details of contrivance, as well as in the material execution of these. The heating, ventilation, means of prompt communication, and other particulars of security and comfort were established by methods superior to any which had been previously in use in this country. The yards for exercise, which as first tried at Cherry Hill, were found to shade too much the cells on the ground floor, were detached and placed in the spaces between the blocks. The warden’s dwelling, which in the Eastern Penitentiary had been erected on the circumference of the radii, at a distance from the centre of supervision, (because of an original intention to have eight blocks of cells, instead of seven,) was fixed in its more suitable relative position. These changes, however, some of which were recommended by Mr. H. himself to the foreign commissioners who visited us,[1] do not diminish the weight due to the fact, that upon the construction of the Eastern Penitentiary, there was a sudden change of model; and that that establishment was the type of the new form, as respects essential features. Notwithstanding the pride reasonably inspired by the flattering evidence of his success, it is one of the most creditable reminiscences connected with the professional career of Mr. H., that instead of resting upon what he had accomplished, instead of reluctantly yielding to the evidence of progress in Europe, he was prompt to seek and to employ in his own later designs, whatever new details he found to be sufficiently recommended by theoretical or experimental evidence. The funds at his disposal for the erection of county jails, were not adequate to the most perfect elaboration of his own, or other conceptions; but it may be seen that when called upon, as he was not long after the completion of the Dauphin county prison, to build one with forty cells for the county of Berks, in Pennsylvania; he availed himself of the opportunity to introduce some of the most recent conveniences of arrangement. In Lancaster county, where his services were next required, he exhibited the same professional interest. The prison of this county had not been long occupied, when he was summoned from his career of public usefulness. He died suddenly at his residence in Philadelphia, on the 28th day of March last.