Sir:-- In your interesting sketch of the Alford Valley Railway in last week's paper, there occurs a mistake, which I should not have noticed were it not that, by my doing so, prejudice may be removed against myself and others to whom it alludes. I am willing to believe it was nothing but a mistake, and entirely acquit you of all desire to misrepresent. I have simply two remarks to make on the subject to which I have alluded.

In the first place, we are not Anabaptists. We abhor, and eschew with all our hearts, the priciples and practice of that fanatical sect. We belong to the Baptists, a body of  Christians which, although somewhat unpopular in Scotland, form in England one of the most influential sections of the Church, in some few English towns being actually the largest; and, in the United States of America, they actually are the largest body of Protestants. In Germany also, they form almost the whole Protestant population, the German Lutheran Church being, with very few exceptions, so far gone as not to deserve the name of Protestant, and the dissenters being almost all Baptists. Sweden is also somewhat in the same case.

      Our doctrines are as nearly as possible the same as those taught in the Scotch Confession of Faith, the articles of the Church of England, and the standards of the French and Swiss Presbyterian Churches, excepting always those portions of them which refer to baptism; and even in the case of them, there is not so much difference, as is generally supposed. In fact, all of these, excepting the Scotch Confession, defend our views of baptism, more or less.

      Secondly, we do not administer baptism in the Don. I for one do not approve, if it can be avoided, of administering the ordinance in the open air in our climate. The circumstance of John baptising in the Jordan I consider as a mere accident, there being no mention of place in the institution of baptism, as recorded in Matthew xxviii., and it could not have been administered in a river in many instances recorded in Scripture. All that we consider necessary is a sufficient quantity of water; and our usual practice is to baptize in baptisteries in our respective places of worship, and we do so at the least quite in as orderly and becoming a manner as our Pœdobaptist friends perform their rite. The mistake on this hand may have arisen from the circumstance of another Baptist congregation in the neighbourhood having, contrary to usual practice among us. several times administered baptism in the Don, at the place to which you refer, and, on one of those occasions, I assisted at the baptism. We have never once done so. I would remark further that, strictly speaking, I am not a lay preacher. I disapprove very decidedly of much that goes on under that manner, and would not wish to be identified with such a practice. I studied for the ministry before I became proprietor of Kemnay, and was licensed to preach as truly as any of your Presbyterian ministers are. From a child, my heart and soul were always in the Christian ministry; and as soon as I could (my desires having been much thwarted), I devoted myself to it. The step which I then took I never have regretted, and never will, i believe, till the day of my death.

      One thing I in a measure regret now, that I did not take the usual ministerial title. My sole reason for not so doing was the circumstance of my having just before that somewhat unexpectedly come into the position of a landed proprietor. As far as the mere title is concerned, I care not a straw for it; but, I see now that the adoption of it, on my part, would have tended in a considerable degree to have removed prejudice.

      I feel much obliged to you for the way in which you have noticed various places on my property; and hope that some parties may thereby be induced to take up their summer quarters in some of these lovely cottages we are now erecting.

      Indeed, the beauty of the prospect from some of them, as well as the fine and healthy exposure, are perhaps not exceeded by any in our county, or, it may be, any other in Scotland. – I am, Sir, faithfully yours.   ALEX. G. BURNETT.

Kemnay House, March 24 1859.