were too familiar to him. Its definite bellow or muttered threat was part of the prevailing influence of the hour or day. He had heard its voice too often to find an omen in it now.
"This time I must congratulate both of you," he said quietly.
"On what?" they cried in unison, shrill with unacknowledged excitement.
"Ladies seldom, if ever, pass a night on a rock lighthouse. You will have that rare privilege."
Enid clapped her hands.
"I am delighted," she exclaimed.
"Will there be a storm, father?" asked Constance.
"I think so. At any rate, only a miracle will enable the tug to reach us before tomorrow, and miracles are not frequent occurrences at sea."
"I know of one," was Enid's comment, with great seriousness for her. He read her thought.
"I was younger then," he smiled. "Now I am fifty, and the world has aged."
CHAPTER V
THE HURRICANE
They descended into the service-room.
"Let me see," said Enid; "it will be nineteen years on the 22d of next June, since you found me floating serenely towards the Gulf Rock in a deserted boat?"
"Yes, if you insist on accuracy as to the date. I might cavil at your serenity."
"And I was 'estimated' as a year old then? Isn't it a weird thing that a year-old baby should be sent adrift on the Atlantic in an open boat and never a word of inquiry made subsequently as to her fate? I fear I could not have been of much account in those days."
"My dear child, I have always told you that the boat had been in collision during the fog which had prevailed for several days previously. Those who were caring for you were probably knocked overboard and drowned."
"But alone! Utterly alone! That is the strangeness of it. I must be an American. Americans start out to hustle for themselves early in life, don't they."
"Certainly, in that respect you might claim the record."
Brand had not told her all the facts of that memorable June morning. Why should he? They were not pleasant memories to him. Why cumber her also with them? For the rest, he had drawn up and read to her, long ago, a carefully compiled account of her rescue and the steps taken to discover her identity.
"I entered on an active and useful career with no such halo of glory," broke in Constance. "I am just plain English, born in Brighton, of parents not poor but respectable. Mother died a year after my birth, didn't she, dad?"
"You were thirteen months old when we lost her," he answered, bending over the clock-work attachment of the fog bell to wipe off an invisible speck of dust. Since his first term of service on the rock the light had changed from an occulting to a fixed one.
"She is buried there, isn't she," the girl went on. "How strange that, amidst our many journeyings, we have never visited Brighton."
"If I were able to take you to her grave-side, I would not do it," said Brand. "I do not encourage morbid sentiments, even of that perfectly natural kind. Your mother, to you, Constance, is like Enid's to her, a dear but visionary legend. In a degree, it is always so between loved ones lost and those who are left. Truth, honor, work, these are the highest ideals for the individual. They satisfy increasingly. Happy as I am in your companionship, you must not be vexed when I tell you that the most truly joyful moment of my life was conferred when my little friend here first responded accurately to external influences."
He laid his hand on an object resting on a table by itself. It looked like an aneroid barometer, but the others knew it was the marine auriscope to which he had devoted so many patient hours.
"Is it in working order now?" asked Constance instantly, and Enid came nearer. Together they examined the small dial. It was equipped with an arrow-headed pointer, and marked with the divisions of the compass but without the distinguishing letters.
These three understood each other exactly. By inadvertence, the conversation had touched on a topic concerning which Brand was always either vague or silent. Both girls were quick-witted enough to know that Constance's mother was never willingly alluded to either by the lighthouse-keeper or by the elderly Mrs. Sheppard who looked after them in infancy, and was now the housekeeper of Laburnum Cottage.
Constance was annoyed. How could she have been so thoughtless as to cause her father a moment's suffering by bringing up painful reminiscences. But he helped her, being master of himself.
He adjusted a switch in the instrument.
"I had no difficulty in constructing a diaphragm which would intercept all sounds," he said. "The struggle came when I wanted an agent which would distinguish and register a particular set of sounds, no matter what additional din might be prevalent at the same time. My hopes were wrecked so often that I began to despair, until I chanced one day to read how the high-tension induction coil could be tuned to disregard electrical influences other than those issued at the same pitch. My anxiety, until I had procured and experimented with a properly constructed coil, was very trying, I assure you."
"I remember wondering what on earth it was," volunteered Enid. "It sounded like a mathematical snake."
"And I am sorry to say that even yet I am profoundly ignorant as to its true inwardness," smiled Constance.
"Yet you girls delight in poets who bid you hearken to the music of the spheres. I suppose you will admit that the ear of, say, Ben Pollard, is not tuned to such a celestial harmony. However, I will explain my auriscope in a sentence. It only listens to and indicates the direction of foghorns, sirens, and ship's bells. A shrill steam whistle excites it, but the breaking of seas aboard ship, the loud flapping of a propeller, the noise of the engines, of a gale, or all these in combination, leave it unmoved."
"I remember once, when we were going from Falmouth to Porthalla in a fog, how dreadfully difficult it was to discover the whereabouts of another steamer we passed en route," said his daughter.
"Well, with this little chap on the bridge, the pointer would have told the captain unerringly. I don't suppose it will be thick whilst you are here, or you would see it pick up the distant blasts of a steamer long before we can hear them, and follow her course right round the arc of her passage. It is most interesting to watch its activity when there are several ships using their sirens. I have never had an opportunity of testing it on more than three vessels at once, but as soon as I could deduce a regular sequence in the seemingly erratic movements of the indicator, I marked the approach and passing of each with the utmost ease."
"Would that stop collisions at sea?"
"Nothing will do that, because some ship's officers refuse at times to exercise due care. But with my instrument on board two ships, and a time chart attached to the drums, there would be no need for a Board of Trade inquiry to determine whether or not the proper warning was given. To the vast majority of navigators it will prove an absolute blessing."
"You clever old thing!" cried Enid. "I suppose you will make heaps of money out of it."
"The inventor is the last man to make money out of his inventions, as a rule," said Brand. "I suppose I differ from the ordinary poor fellow inasmuch as I am not dependent for a livelihood on the success of my discovery."
"There's not the least little bit of chance of there being a fog
