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1858: January 13-15: Lynn, to give lecture. Stays another day to explore. Returns via Boston and Cambridge and Harvard library.
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1858: February 15: Cambridge.
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1858: May 22-24: Worcester, on his way to New York City.
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1858: May 25-26: New York
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1858: May 27: Cambridge, Boston, home to Concord.
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1858: June 2-4: Mount Monadnock, Jaffrey, New Hampshire. Takes the Fitchburg Railroad and meets H.G.O. Blake in Fitchburg. Go from there.
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1858: June 21: Cambridge.
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1858: July 2-19: White Mountains, New Hampshire, with Edward Hoar, by carriage.
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1858: September 21-24: Cape Ann area of Massachusetts.
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1858: December 7-10: Boston, then New Bedford.
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1858: December 15: Boston Society of Natural History.
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1859: January 11:
Cambridge and Harvard College.
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1859: February 22-24: Worcester. Gives lectures at Blake’s house.
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1859: February 28: Cambridge and Boston.
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1859: April 26-27: Lynn, to give lecture. Spends next day walking in area before going home.
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1859: June 13: Boston.
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1859: June 22-23-24: Billerica, to do surveying of bridges and river.
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1859: June 23: Wayland, bridges.
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1859: August 15:
Cambridge and Harvard library.
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1859: October 6: Boston
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1859: October 9: Boston, to give lecture.
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1859: November 1: Boston, to give a John Brown lecture.
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1859: November 3: Worcester, to give a John Brown lecture.
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1859: November 5: Boston.
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1859: December 16:
Cambridge and Harvard library.
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1859-1860: Surveys the Concord River from Billerica to East Sudbury for the River Meadow Association.
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1860: February 6:
Cambridge and Harvard College library.
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1860: April: Lexington, to do surveying.
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1860: April 9:
Cambridge and Harvard College library.
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1860: May 3: Cambridge and Boston.
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1860: May 21: Cambridge.
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1860: July 25: Wayland, to see stuffed bird collection with Edward Hoar.
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1860: August 4-9: Mount Monadnock, Jaffrey, New Hampshire, with companion.
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1860: September 8-10: Lowell, to give lecture.
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1860: November 7:
Cambridge and Harvard College and Boston.
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1860: November 9 and 16: Boxborough, to document Inches Woods.
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1860: December 10-12: Waterbury, Connecticut, to lecture. Stays first night with friends in Worcester.
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1861: May 11-July 11: The Journey West to Minnesota and back.
more ...
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1861: August 19-24: New Bedford, to visit Ricketson. Gets picture taken.