Now, let the reader suppose himself to have read from Mr. Smith’s address, as much more of the same kind as the above, and then say how far his evidence goes to sustain Mr. Webster’s discovery, that slavery can never go into New Mexico. Mr. Smith’s address has been published for two months; it has been on the tables of members, published, and quoted from in the newspapers, and yet Mr. Webster continues to cite Mr. Smith as a witness in his favor. What influences were used to induce Mr. Smith to withhold, in the letter to Mr. Webster, the facts and views which he has so clearly brought out in the letter to his constituents? The next and last citation is from an officer at Santa Fe. No name is given. We are informed neither of the character of the author nor of his means of information; and if this authority is as fallacious and deceptive as the preceding, it is a great deal worse than nothing. It would be like the testimony sometimes offered in court, which ruins the cause and dishonors the counsel. 4. In his Kennebec letter, Mr. Webster says, “I have studied the geography of New Mexico diligently, having read all that I could find in print, and inquired of many intelligent persons, who have been in the country, traversed it, and become familiar with it.” He sets forth his knowledge in this confident tone, so that his impressions in favor of the _natural_ prohibition of slavery may be more readily received. According to this statement, he must have read the letters of Mr. James S. Calhoun, Indian agent at Santa Fe, communicated to Congress by the President, on the 23d of January last. Speaking of the Navajoes, a tribe of 7,000 Indians, within the limits of what it is proposed to include in New Mexico, Mr. Calhoun says, that it is “not a rare instance for one individual to possess 5,000 to 10,000 sheep, and 400 to 500 head of other stock,” (p. 184;) and that their country “is rich in its valleys, rich in its fields of grain, and rich in its vegetables and peach orchards.” (p. 199.) “We encamped,” says he, “near extensive cornfields, belonging to the Navajoes.” (p. 197.) Their “soil is easy of cultivation, and capable of sustaining nearly as many millions of inhabitants as they have thousands.” (p. 202.) Look at this: A country owned by one tribe capable, according to Mr. Calhoun, of sustaining nearly 7,000,000 inhabitants, and yet, as Mr. Webster avers, inaccessible to slavery, on account of its barrenness!