An image of Brewer is here on p. 120
http://books.google.com/books?id=e34EmE3tkfkC

Jim: the glass ball era ended with the introduction of the Ligowsky Clay Target in 1880. The first "International Clay Pigeon Tournament" (or inanimate target tournament) was run by Geo. Ligowsky's and J. E. Blume's National Shooting Association in Chicago in 1884; the second International Tournament was in New Orleans in 1885.