"How many directors are there?"
"I don't know."
"Do they own any pipe lines?"
"I don't know."
"I don't know anything about the rates of transportation."[712]
"What quantity of oil was exported by the different concerns with which you were connected from the port of New York in 1881?" the president was asked.
"I do not know."
"How many millions of barrels of oil were refined by such concerns in the vicinity of New York in 1881?"
"I don't know how much was refined."