He was a medical missionary, and he was liable to be called at any time to one or other of the islands in the group.
Even the whaleboat is not so very safe a conveyance in the stormy pacific of the wet season, but often he would be sent for in a canoe, and then the danger was great.
In cases of illness or accident he never hesitated.
A dozen times he had spent the whole night baling for his life, and more than once Mrs. Davidson had given him up for lost.
"I`d beg him not to go sometimes," she said, "or at least to wait till the weather was more settled, but he`d never listen.
He`s obstinate, and when he`s once made up his mind, nothing can move him."
"How can I ask the natives to put their trust in the Lord if I am afraid to do so myself?" cried Davidson.
"And I`m not, I`m not.
They know that if they send for me in their trouble I`ll come if it`s humanly possible.
And do you think the Lord is going to abandon me when I am on his business?
The wind blows at his bidding and the waves toss and rage at his word."
Dr. Macphail was a timid man.
He had never been able to get used to the hurtling of the shells over the trenches, and when he was operating in an advanced dressing-station the sweat poured from his brow and dimmed his spectacles in the effort he made to control his unsteady hand.
He shuddered a little as he looked at the missionary.
"I wish I could say that I`ve never been afraid," he said.
"I wish you could say that you believed in God," retorted the other.
But for some reason, that evening the missionary`s thoughts travelled back to the early days he and his wife had spent on the islands.
"Sometimes Mrs. Davidson and I would look at one another and the tears would stream down our cheeks.
We worked without ceasing, day and night, and we seemed to make no progress.
I don`t know what I should have done without her then.
When I felt my heart sink, when I was very near despair, she gave me courage and hope."
Mrs. Davidson looked down at her work, and a slight colour rose to her thin cheeks. Her hands trembled a little.
She did not trust herself to speak.
"We had no one to help us.
We were alone, thousands of miles from any of our own people, surrounded by darkness.
When I was broken and weary she would put her work aside and take the Bible and read to me till peace came and settled upon me like sleep upon the eyelids of a child, and when at last she closed the book she`d say: `We`ll save them in spite of themselves.` And I felt strong again in the Lord, and I answered: `Yes, with God`s help I`ll save them.
I must save them.`"
He came over to the table and stood in front of it as though it were a lectern.
"You see, they were so naturally depraved that they couldn`t be brought to see their wickedness.
We had to make sins out of what they thought were natural actions.
We had to make it a sin, not only to commit adultery and to lie and thieve, but to expose their bodies, and to dance and not to come to church.
I made it a sin for a girl to show her bosom and a sin for a man not to wear trousers."
"How?" asked Dr. Macphail, not without surprise.
"I instituted fines.
Obviously the only way to make people realize that an action is sinful is to punish them if they commit it.
I fined them if they didn`t come to church, and I fined them if they danced.
I fined them if they were improperly dressed.
I had a tariff, and every sin had to be paid for either in money or work.
And at last I made them understand."
"But did they never refuse to pay?"
"How could they?" asked the missionary.
"It would be a brave man who tried to stand up against Mr. Davidson," said his wife, tightening her lips.
Dr. Macphail looked at Davidson with troubled eyes.
What he heard shocked him, but he hesitated to express his disapproval.
"You must remember that in the last resort I could expel them from their church membership.""
"Did they mind that?"
Davidson smiled a little and gently rubbed his hands.
"They couldn`t sell their copra.
When the men fished they got no share of the catch.
It meant something very like starvation.