None of the said courts shall in any case proceed against or punish any person for having made default by not appearing to give evidence in obedience to any writ of subpoena or other process issued under the powers given by this Act, unless it shall be made to appear to such court that a reasonable and sufficient sum of money to defray the expenses of coming and attending to give evidence, and of returning from giving such evidence, had been tendered to such person at the time when such writ of subpoena or process was served upon such person.