Evans, L. (1 July 1816). "Letter of Mr. Evans on the Woolwich Observatory". The Monthly Magazine. 41 (285): 483–484. Evans pointed out two mistakes in Hutton's statements concerning private observatories.
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Hutton, Charles (1815). "English observatories (private)". A Philosophical and Mathematical Dictionary. Vol. 2. Printed for the author etc. p. 129.