Letter, from Henry Warburton to Sir John Herschel, dated at London Autograph letter signed by sender. Destroy all Henry Warburton's letters claiming errors in Leonhard Euler's values for Bernoulli's numbers. Mr. Hensley of Trinity College found weakness in Henry Warburton's continued subtraction method. Clarifies symbols Henry Warburton used to represent P. S. Laplace's expressions of Bernoulli's numbers. 13 December 1847