I'm working on a project now for a client ( a major corp. know to everyone in the free world) who just bought a tract of several hundred acres here in East Texas. One of their engineers did the aerial map thing, picked a lat and long off the map, traveled to the given coords via a handheld GPS and had a water well installed. Only problem is that the well is 20 feet into the adjoining property. Now the neighbor gets a free well, gets paid damages, and gets the property line in question staked for the new fence to be built between the two properties.
In this particular instance, I could have located the two corners on the line without surveying the entire tract because I had done some work in this area back in the mid-80's and had already located the old iron axle at the North corner and the pine knot buried under 2 foot of silt in a slough 3500 feet to the South.
The property descriptions you have to work with will not allow the methods given here so far. They were already balanced to the best of ability when they were written. They give a good starting point for recon work, but thats about it. Your description is given to the nearest 1/2 degree and 1/2 pole and was probably written sometime in the 1800's. Talk to your neighbors and see if they have had any survey work done on your common lines. If so, see who they had do them, they may have information in their records which would allow them to identify the corners for you. When dealing with a closed figure ( or in this case a figure which almost closes ) it's not just the distance but also the angular relationhip between the adjoining lines which come into play. And then too, as already stated, if the corners called for are found they hold over given bearing and distance. That is why I say you can't just have one line surveyed. I'm not trying to drum up business, just trying to keep you from wasting money. It's not uncommon for lines of those lengths to be off 100' feet or more when dealing with an old property description such as yours. Unless you find a surveyor who has a history in that area, the most anyone will be able to tell you is "Here are two points that might almost be kinda sorta close to to where your corners might probably oughta be".
Bruce