In 1742 Dodson published "The Anti-Logarithmic Canon. Being a table of numbers consisting of eleven places of figures, corresponding to all Logarithms under 100,000, with an Introduction containing a short account of Logarithms". This was a unique tabulation until 1849. The canon had been actually calculated, it is said, by Walter Warner and John Pell, in the period 1630 to 1640. Its provenance was that Warner had left it to Herbert Thorndike, at whose death it came to Richard Busby, and finally was bought for the Royal Society; but for some years it had been lost. In a letter of Pell's, 7 August 1644, written to Sir Charles Cavendish, it is said that Warner became bankrupt, and Pell surmises that the manuscript would be destroyed by the creditors in ignorance.