Statistics for occurrence #1 of “Captain McGowan” in chapter 19, page 14 of Historic leaves, volume 1, April, 1902 - January, 1903:

...-founder, which was of extraordinary pedigree, and the best trotting and running horse in the country, and the first horse to ever run twenty miles in an hour. This horse had one rival only, called Captain McGowan , who accomplished the feat in 1885.
...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  

† This entity has been selected by the automated classifier as the most likely match in this context. It may or may not be the correct match.