Thoreau writes in his journal:
An advertisement for Concord Academy appears in the Concord Freeman (Concord Freeman, 6 March 1840:3), which runs in every issue through 17 April, with the exception of the 13 March and 27 March issues. The same advertisement runs concurrently in the Yeoman’s Gazette from 7 March through 2 May, except in the 25 April issue.