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In response to "Counting the Cattle of the Sun" [April], Chris Rorres of Drexel University tells me that more information can be found in a preprint entitled "A Simple Solution to Archimedes' Cattle Problem," by A. Nygren of the University of Oulu in Finland. The preprint describes an algorithm for solving the problem that takes only five seconds to run on a Pentium II personal computer using Maple or Mathematica software. Links to electronic files of this preprint are on Rorres's Web page (www.mcs.drexel.edu/- crorres/Archimedes/Cattle/Solution2.html). —I.S.

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