It it to be expected that, now its twentieth year, many of the earlier friends of the Gardener's Monthly should be passing away. Our venture had no better friend than Dr. J. P. Kirtland, and, though full of years and honors, we learn of his decease with profound regret. His private letters of encouragement were always welcome; and he loved to dwell on the welcomeness of the Monthly, as reminding him of the city in which he received his medical education. The Mass. Horticultural Society, ever alive to the honor of Horticulture all over the Union, recently passed resolutions of sorrow in his behalf, and we hope to give in our next the preparatory remarks of Col. Wilder,as a brief but excellent condensation, of the life and services of our deceased friend.