"It is because they desire to do so," said MacNair. "Polaris is a sincere lover of humanity. She is a true womanly woman, and as such takes pleasure in rendering assistance to all who are afflicted or distressed. Besides, she is by education, inclination and long experience, an expert in aerial navigation, and holds her position as head of the Life Saving Service by virtue of her superior qualities." "But," said Battell, "as head of a department, she might send her subordinates and not take the hardest work on herself. It seems to me, that she personally superintends everything, doing as much work as a half dozen others ought to do." "Polaris always leads," said MacNair. "Besides, in your case there were especial reasons why she should personally lead the search. You were exposed to peculiar dangers, and it was uncertain whether you had been carried into the Oscan or Umbrian oceans, by the ocean currents. So, to guard against possible failure, she did not trust entirely to the patrols, but continued to circumnavigate the concave herself. "But few persons could have kept up the incessant activity and watchfulness that she and Dione have done ever since they captured your dispatches. They were determined that you should not be carried into the stormy waters of the south if persistent vigilance could prevent it." "Well, thank God, they were successful!" said Battell. "If we should live a thousand years we could not pay them for their efforts in our behalf." "No thanks are required," again interrupted Iola. "Polaris has only done her duty, and as to pay, she could hardly comprehend what you mean by it. She doubtless felt that she was amply rewarded for all her efforts when she succeeded in finding you. Success, in a praiseworthy undertaking, is the only reward that any man or woman can afford to work for. She has found you and therefore has her reward, while we can enjoy the pleasure of providing you with the comforts of a home and freedom from anxiety, toil and danger. You will only get what our common mother nature has prepared alike for all her children, while we have been especially benefited by the opportunity it has given us of helping a brother in distress. If there is any difference, we have more reasons to be thankful than you have, as we take pleasure in contributing to the happiness of others. It is in very truth 'more blessed to give than to receive.'"