Read it through once

"As many notes as you please. You can write here." He drew out a note-case and one of the new stylographic pens. "I've even got an envelope--you see how everything's predestined! There--steady the thing on your knee, and I'll get the pen going in a second. They have to be humoured; wait--" He banged the hand that held the pen against the back of the bench. "It's like jerking down the mercury in a thermometer: just a trick. Now try--"