In his 7th of March speech, Mr. Webster declared it to be a natural impossibility that African slavery could ever exist “in California or New Mexico.” (p. 42.) He now defines the southern boundary of New Mexico. It can hardly be less, says he, than “a thousand miles” from the forty-second degree of north latitude. This places it four degrees south of El Paso. He is in favor of that part of the bill which gives these four degrees to Texas. According to him, therefore, should Texas get possession of these four degrees of what is now New Mexican territory, slavery will exist, as far up as the old southern boundary line of New Mexico, by virtue of the laws of Texas, but beyond this line, although within the bounds of Texas, it will not exist, because forbidden by the “will of God.” Hence the extraordinary spectacle will be exhibited, of the existence of slavery coming plump up to the south side of an imaginary line, by the laws of Texas, while on the north side of the said imaginary line, its existence will be cut square off by the “will of God,” although both sides are within the same political jurisdiction. This will be a miracle, compared with which the supposed miraculous preservation of the Jewish feature and complexion, for two thousand years, will be unworthy to be mentioned. It remains to be seen, however, whether this miracle will be vouchsafed to Mr. Webster, as a proof of the divine favor. On the 5th of June, Mr. Webster voted against incorporating the “Proviso” into the governments for New Mexico and Utah, because slavery was already prohibited there by “Asiatic scenery” and the law of “physical geography.” On the next day, too, he voted against the following amendment, offered by Mr. Walker: “And that peon servitude is forever abolished and prohibited.” Whether he so voted because this species of slavery, (which is an existing institution at the present time,) was prohibited by “scenery” and “geography,” does not appear.