Dr.Tisco, here, is--" "An ignoramus on the subject of mining," declared the secretary, who appeared just then to wake up.
"Carlos is modest," laughed Don Luis.

"True, he is not a skilled mining man, yet he knows so much on the subject that, compared with him, I am an ignoramus.

But that is what you are here for, you two.

You are the experts.

Investigate, and then instruct us." "Have you any record of the number of times that you have encountered the blank rock, and the number of feet in thickness of the wall in each case ?" Tom asked.
"Oh, no." "That is unfortunate," said Reade, thoughtfully.