The first reference to the giant sequoias of Calaveras Big Trees by Europeans is in 1833, in the diary of the explorer J. K. Leonard; the reference does not mention any specific locality, but his route would have taken him through the Calaveras Grove. This discovery was not publicized. The next European to see the trees was John M. Wooster, who carved his initials in the bark of the 'Hercules' tree in the Calaveras Grove in 1850; again, this received no publicity. Much more publicity was given to the "discovery" by Augustus T. Dowd of the North Grove in 1852, and this is commonly cited as the discovery of both the grove and the species as a whole.