From whatever source the negotiators of the treaty of 1783 derived their view of the boundary, that instrument directs that it shall be a due north line from the source of the river St. Croix. This expression is too definite to require explanation or illustration, and it is only for those purposes that any other instrument can be permitted to be quoted. In the passages referred to the words "versus septentrionem" occur three times, and in two of the instances are qualified by the context in such manner as to leave no possible doubt as to the meaning. The first time they occur the words of the passage are, "prope latitudinem quadraginta trium graduum aut eo circa versus septentrionem." The free translation into modern idiom is beyond doubt, "near the forty-third degree of north latitude or thereabout;" and the direction toward the north must be along a meridian line on which latitude is measured, or due north. Messrs. Mudge and Featherstonhaugh, instead of connecting in their translation the words "versus septentrionem" with the words "prope latitudinem," etc., with which they stand in juxtaposition in the Latin text which they quote, connect them with the words "ad occidentem tendentem," which occur in the next clause of the sentence, even according to their own punctuation. We note this as a false translation, although it does not touch the point in dispute. They have, indeed, attempted to use it in their argument; but even if the use they make of it had been successful their inferences fall, because drawn from erroneous premises. The second clause in which the words occur is as follows: "Ad stationem navium Sanctae Mariae vulgo St. Marys Bay, et deinceps versus septentrionem per directam lineam introitum sive ostium magnae illius stationis navium trajicientem," etc., "ad fluvium vulgo nomine Sanctae Crucis appellatum." Here the line, although directed to be drawn toward the north, is also directed to be drawn between two given points, and it is clear that under the double direction, if they should differ from each other, the position of the given points must govern, and the line be traced from one of them to the other, no matter what may be their bearings. The last time the words occur is after the direction that the line shall pass up the St. Croix and to the most remote western spring or fountain of that stream, "unde per imaginariam lineam directam quae pergere per terram seu currere versus septentrionem concipietur." Here alone can any doubt exist as to the meaning of the terms, and that is easily solved.