M'Mahon, Bernard, was a native of Ireland. Implicated in the disastrous rebellion of'98, he fled to this country, and was for some years connected with a political newspaper of Philadelphia. Our purpose is, however, to refer to Mr. M'Mahon as associated with the subject of this work. Mr. M. ultimately established himself as a Nursery and Seedsman in that city, and published an excellent hook on gardening, the "American Gardener's Calendar," which was favourably received, and opportunely issued, for at that time information on the art, of which it treated, was in the United States much needed. He was said to have been a man of liberal education, and an ardent admirer of horticulture. It is probable his love for it led to his embarking in the sale of plants and seeds as a profession. In connection with his seed-store, Mr. M. established a Nursery near the city, and concentrated many interesting specimens on his grounds. They were, at a later day, under the management of his son, but are now, we believe, no longer cultivated as a Nursery.