Mr. Dunbar, during his excursion up the Washita, the last fall and winter, collected some dried specimens of plants which he has sent me in order to have them ascertained. I know I cannot dispose of them better than by transmitting them to you, with a request of the result of your investigation.   he went as far as the hotsprings on that river, 500. miles up it. he found their temperature 150°. of Farenheit. his journal & Dr. Hunter’s furnish us with the geography of the river, accurately taken, and with a good deal of matter relative to it’s natural history. I shall put them into the hands of some one to reduce into a small compas the results divested of details too long for the common reader. I shall be happy to recieve in time to incorporate into this, your information as to the plants now sent. Accept my friendly salutations & assurances of great esteem & respect.