From Horace Darwin 19 June 1877
Cancelled: Not a letter: Horace and CD were both at Stonehenge.
Notes on the position of one of the fallen stones [at Stonehenge].
Please cite as
Darwin Correspondence Project, “Letter no. 11009,” accessed on 26 April 2017, http://www.darwinproject.ac.uk/DCP-LETT-11009