G. K. Gilbert - "A Captain Bold"

The National Geographic Society is profiling their 33 founding members in recognition of their upcoming 125th anniversary, and published a short bio of Grove Karl Gilbert, one of the most influential geologists in the field, who did some of the early explorations of Arizona.  [Photo credit Wikipedia]

The article starts out, "Grove Karl Gilbert was considered by his own and future generations to be the greatest of all American geologists, and “a captain bold,” according to Australian geologist E.C. Andrews."