The Last Harvest by John Burroughs

Men who write Journals are usually men of certain marked traits -- they are idealists, they love solitude rather than society, they are self-conscious, and they love to write. At least this seems to be true of the men of the past century who left Journals of permanent literary worth -- Amiel, Emerson, and Thoreau. Amiel's Journal has more the character of a diary than has Emerson's or Thoreau's, though it is also a record of thoughts as well as of days. Emerson left more unprinted matter than he chose to publish during his lifetime.

The Journals of Emerson and Thoreau are largely made up of left-overs from their published works, and hence as literary material, when compared with their other volumes, are of secondary importance. You could not make another "Walden" out of Thoreau's Journals, nor build up another chapter on "Self-Reliance," or on "Character," or on the "Over-Soul," from Emerson's, though there are fragments here and there in both that are on a level with their best work.