Author talk:Frederic Rodrigo Gruger

sources:
 * https://www.societyillustrators.org/fr-gruger
 * http://onlinebooks.library.upenn.edu/webbin/book/lookupname?key=Gruger%2c%20Frederic%20Rodrigo
 * http://giam.typepad.com/100_years_of_illustration/fr_gruger_18711953/