reading penn july 12 1864 dear sir your letter of the 4 has just reached me from washington the only way to get the work on n am birds is to procure the extra edition under the title of birds of north america1 by baird2 cassin3 and laurence.4 you can get the work from lippincott & co.5 philada or from john cassin 11th and chestnut philada price 5.00 for the descriptive part and 15.00 for the plates 100 in number you can get either separately or both together very truly yours spencer f baird asst su robert ridgway mt carmel ill
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