DEAR BOY: Lord Clarendon in his history says of Mr. John Hampden THAT HE HAD A HEAD TO CONTRIVE, A TONGUE TO PERSUADE, AND A HAND TO EXECUTE ANY MISCHIEF. I shall not now enter into the justness of this character of Mr. Hampden, to whose brave stand against the illegal demand of ship-money we owe our present liberties; but I mention it to you as the character, which with the alteration of one single word, GOOD, instead of MISCHIEF, I would have you aspire to, and use your utmost endeavors to deserve. The head to contrive, God must to a certain degree have given you; but it is in your own power greatly to improve it, by study, observation, and reflection. As for the TONGUE TO PERSUADE, it wholly depends upon yourself; and without it the best head will contrive to very little purpose. The hand to execute depends likewise, in my opinion, in a great measure upon yourself. Serious reflection will always give courage in a good cause; and the courage arising from reflection is of a much superior nature to the animal and constitutional courage of a foot soldier. The former is steady and unshaken, where the 'nodus' is 'dignus vindice'; the latter is oftener improperly than properly exerted, but always brutally. The second member of my text (to speak ecclesiastically) shall be the subject of my following discourse; THE TONGUE TO PERSUADE--as judicious, preachers recommend those virtues, which they think their several audiences want the most; such as truth and continence, at court; disinterestedness, in the city; and sobriety, in the country.