speculating

What is the use of our speculating in this way when the original plans were actually found on West?”

He would always come back to his lost treaty, wondering, guessing, speculating, as to what Holmes was doing, what steps Lord Holdhurst was taking, what news we should have in the morning.

More likely he has been speculating on the Bourse, and has lost money.”

“So,” said Andrea, “you are speculating upon me?”