The letters of Thoreau and Emerson from the 1840's and 1850's:

• Emerson - Thoreau Letters (I-V) 1847 »
  The Emerson-Thoreau Correspondence: Letters of Emerson and Thoreau from the 1847. Letters I-V. (9 pages)
  
  
• Emerson - Thoreau Letters (VI-X) 1848 »
  Emerson-Thoreau Correspondence: Letters of Emerson and Thoreau from the 1848. Letters VI-X. (6 pages)
  
  
• Emerson - Thoreau Letters (XI-XV) 1848-56 »
  The Emerson-Thoreau Correspondence: Letters of Emerson and Thoreau from 1848 to 1856. Letters XI-XV. (5 pages)
  
  
• Emerson - Thoreau Letters (I-VI) The Dial Period »
  Correspondence between Emerson and Thoreau from 1843. Letters I to VI. (8 pages)
  
  
• Emerson - Thoreau Letters (VII-XI) The Dial Period »
  Correspondence between Emerson and Thoreau from 1843. Letters VII to XI. (7 pages)
  
  
• Emerson -Thoreau Letters (XI-XVI) The Dial Period »
  Correspondence between Emerson and Thoreau from 1843. Letters XI to XVI. (6 pages)