From:
Charles Robert Darwin
To:
Charles Lyell, 1st baronet
Date:
[8 June 1850]
Source of text:
American Philosophical Society (Mss.B.D25.94)
Summary:
Discusses depths at which ripple-marks appear on sea-floor.
Personal and social comment.
Mentions receiving Agassiz’s Lake Superior [1850].
Contributor:
Darwin Correspondence Project