...rom the New York Evening Post, Aug. 29.] for Matamoras or A Market. A day or two ago the Evening Post called attention to the fact that the first applications for clearances to Matamoras, Mexico , made at the custom-house for three years past have been within a week; and, also, that the convenient town of Brownsville, Texas, a little distance from Matamoras, on the other side of the Rio Grand...