midnight
Therefore in the _ Snowbird _ we will make the journey . '' Jack Darrow and Mark Sampson were glad enough to be of the party aiming to reach northern Alaska and the Endicott Range , if Professor Henderson really intended going to find the strange herb for which Dr. Todd was willing to pay so generously . Of discussion , pro and con , there was much . Indeed , they sat up until after midnight after the reading of Dr. Todd 's letter , talking over the contemplated journey , and gradually the details of the trip , including all preparations for it , were worked out . Jack and Mark put into the affair , once they were determined to aid the professor , their characteristic energy . Professor Henderson wired his brother scientist that he would undertake the journey to Alaska , and accepted the ten thousand dollars to defray expenses . Andy Sudds made characteristic preparations for hunting the big game of the Alaskan mountains .