In consequence of the high opinion entertained by the board in the talents and usefulness of Mr. Craig, as the able instructor of youth, and the valuable member of society, his resignation was accepted by the board with sentiments of extreme regret."

In August 1819, the Rev. Joseph Penney was chosen Principal of the Hall. He was associated with the Rev. John Mulligan. These gentlemen continued their connection with the Academy until the year 1821, when upon their resignation they were succeeded by the Rev. Timothy Clowes, D. D. He remained but about two years. In May 1823, the institution passed into the hands of Mr. Jonathan W. Kellogg, who continued to have charge of it till May 1834. During this period the Academy flourished. A large number of pupils from abroad were boarded in the Hall, and the Board of Trustees in 1825, were enabled to liquidate entirely the remains of the debt, under which the Academy had labored from its foundation. Upon his taking charge of the institution, Mr. Kellogg divided the English, or common school department, into male and female, and employed separate instructors for each. Previously to this, the boys and girls were associated in one room, and taught by one teacher. The separation introduced by Mr. Kellogg, and which was a very great improvement, has continued to this day. Not only separate and distinct apartments, but separate entrances have been provided for the males and females. The first Instructress under this new arrangement, was Miss Maria Jones. She was succeeded in 1829, by Miss Julia DeForest. She remained but about one year. Mrs. W. W. Maltby then taught for about six months, and was succeeded in 1831, by Miss Almira Meach, who taught for two years. A short time previous to Mr. Kellogg's leaving the institution, Miss Rudd had charge of the female department, assisted by Miss Ely. The male assistants under Mr. Kellogg, were Jonathan B. Kidder, John Frey, Theodore Morrell, William Allgeo, William H. Campbell, Isaac Grier, J. W. Thompson, J. J. Prentice and some others. We need not specify the precise times, during which these gentlemen taught. Miss Geib, Miss Philomela Rolla, Miss Emma Gillingham, and some others, were employed in giving instruction in music.

During the period in which Mr. Kellogg had charge of the Academy, many improvements were made to the building and grounds. In the former, in addition to a front piazza, a full suit of dormitories was finished in the attic, besides other important changes. The campus, which was free of trees and shrubbery, excepting two rows of decaying poplars extending in a diagonal direction, from the corners of the building to the road, was greatly improved. The heart, which lies in front of the entrance, was laid out and planted with flowers and shrubs. Besides the Balm of Gilead, in the centre of the heart, many ornamental forest trees, consisting of the tulip, the button ball and the sugar maple, together with a line of flowering shrubs, all around the front and sides, were set out. In addition to these, a row of button-ball trees was planted on the front walk.