'RESPECTED SIR,—Calling at the post-office this morning, our worthy and efficient postmaster offered for my perusal a paragraph in the Boston Morning Post of the 3d instant, wherein certain effusions of the pastoral muse are attributed to the pen of Mr. James Russell Lowell. For aught I know or can affirm to the contrary, this Mr. Lowell may be a very deserving person and a youth of parts (though I have seen verses of his which I could never rightly understand); and if he be such, he, I am certain, as well as I, would be free from any proclivity to appropriate to himself whatever of credit (or discredit) may honestly belong to another. I am confident, that, in penning these few lines, I am only forestalling a disclaimer from that young gentleman, whose silence hitherto, when rumor pointed to himward, has excited in my bosom mingled emotions of sorrow and surprise. Well may my young parishioner, Mr. Biglow, exclaim with the poet,

"Sic vos non vobis," &c.;

though, in saying this, I would not convey the impression that he is a proficient in the Latin tongue,—the tongue, I might add, of a Horace and a Tully.

'Mr. B. does not employ his pen, I can safely say, for any lucre of worldly gain, or to be exalted by the carnal plaudits of men, digito monstrari, &c. He does not wait upon Providence for mercies, and in his heart mean merces. But I should esteem myself as verily deficient in my duty (who am his friend and in some unworthy sort his spiritual fidus Achates, &c.), if I did not step forward to claim for him whatever measure of applause might be assigned to him by the judicious.

'If this were a fitting occasion, I might venture here a brief dissertation touching the manner and kind of my young friend's poetry. But I dubitate whether this abstruser sort of speculation (though enlivened by some apposite instances from Aristophanes) would sufficiently interest your oppidan readers. As regards their satirical tone, and their plainness of speech, I will only say, that, in my pastoral experience, I have found that the Arch-Enemy loves nothing better than to be treated as a religious, moral, and intellectual being, and that there is no apage Sathanas! so potent as ridicule. But it is a kind of weapon that must have a button of good-nature on the point of it.

'The productions of Mr. B. have been stigmatized in some quarters as unpatriotic; but I can vouch that he loves his native soil with that hearty, though discriminating, attachment which springs from an intimate social intercourse of many years' standing. In the ploughing season, no one has a deeper share in the well-being of the country than he. If Dean Swift were right in saying that he who makes two blades of grass grow where one grew before confers a greater benefit on the state than he who taketh a city, Mr. B. might exhibit a fairer claim to the Presidency than General Scott himself. I think that some of those disinterested lovers of the hard-handed democracy, whose fingers have never touched anything rougher than the dollars of our common country, would hesitate to compare palms with him. It would do your heart good, respected Sir, to see that young man mow. He cuts a cleaner and wider swath than any in this town.

'But it is time for me to be at my Post. It is very clear that my young friend's shot has struck the lintel, for the Post is shaken (Amos ix. 1). The editor of that paper is a strenuous advocate of the Mexican war, and a colonel, as I am given to understand. I presume, that, being necessarily absent in Mexico, he has left his journal in some less judicious hands. At any rate, the Post has been too swift on this occasion. It could hardly have cited a more incontrovertible line from any poem than that which it has selected for animadversion, namely,—

"We kind o' thought Christ went agin war an' pillage."

'If the Post maintains the converse of this proposition, it can hardly be considered as a safe guide-post for the moral and religious portions of its party, however many other excellent qualities of a post it may be blessed with. There is a sign in London on which is painted,—"The Green Man." It would do very well as a portrait of any individual who should support so unscriptural a thesis. As regards the language of the line in question, I am bold to say that He who readeth the hearts of men will not account any dialect unseemly which conveys a sound, and pious sentiment. I could wish that such sentiments were more common, however uncouthly expressed. Saint Ambrose affirms, that veritas a quocunque (why not, then, quomodocunque?) dicatur, a, spiritu sancto est. Digest also this of Baxter: "The plainest words are the most profitable oratory in the weightiest matters."

'When the paragraph in question was shown to Mr. Biglow, the only part of it which seemed to give him any dissatisfaction was that which classed him with the Whig party. He says, that, if resolutions are a nourishing kind of diet, that party must be in a very hearty and flourishing condition; for that they have quietly eaten more good ones of their own baking than he could have conceived to be possible without repletion. He has been for some years past (I regret to say) an ardent opponent of those sound doctrines of protective policy which form so prominent a portion of the creed of that party. I confess, that, in some discussions which I have had with him on this point in my study, he has displayed a vein of obstinacy which I had not hitherto detected in his composition. He is also (horresco referens) infected in no small measure with the peculiar notions of a print called the Liberator, whose heresies I take every proper opportunity of combating, and of which, I thank God, I have never read a single line.