Harrison was now becoming old and feeble. He had attained the age of seventy-four. He had spent forty long years in working out his invention. He was losing his eyesight, and could not afford to wait much longer. Still he had to wait.
"Full little knowest thou, who hast not tried,
What hell it is in suing long to bide;
To lose good days, that might be better spent;
To waste long nights in pensive discontent;
To spend to-day, to be put back to-morrow,
To feed on hope, to pine with fear and sorrow."
But Harrison had not lost his spirit. On May 30th, 1765, he addressed another remonstrance to the Board, containing much stronger language than he had yet used. "I cannot help thinking," he said, "that I am extremely ill-used by gentlemen from whom I might have expected a different treatment; for, if the Act of the 12th of Queen Anne be deficient, why have I so long been encouraged under it, in order to bring my invention to perfection? And, after the completion, why was my son sent twice to the West Indies? Had it been said to my son, when he received the last instruction, 'There will, in case you succeed, be a new Act on your return, in order to lay you under new restrictions, which were not thought of in the Act of the 12th of Queen Anne,'—I say, had this been the case, I might have expected some such treatment as that I now meet with.
"It must be owned that my case is very hard; but I hope I am the first, and for my country's sake I hope I shall be the last, to suffer by pinning my faith upon an English Act of Parliament. Had I received my just reward—for certainly it may be so called after forty years' close application of the talent which it has pleased God to give me—then my invention would have taken the course which all improvements in this world do; that is, I must have instructed workmen in its principles and execution, which I should have been glad of an opportunity of doing. But how widely different this is from what is now proposed, viz., for me to instruct people that I know nothing of, and such as may know nothing of mechanics; and, if I do not make them understand to their satisfaction, I may then have nothing!
"Hard fate indeed to me, but still harder to the world, which may be deprived of this my invention, which must be the case, except by my open and free manner in describing all the principles of it to gentlemen and noblemen who almost at all times have had free recourse to my instruments. And if any of these workmen have been so ingenious as to have got my invention, how far you may please to reward them for their piracy must be left for you to determine; and I must set myself down in old age, and thank God I can be more easy in that I have the conquest, and though I have no reward, than if I had come short of the matter and by some delusion had the reward!"
The Right Honourable the Earl of Egmont was in the chair of the Board of Longitude on the day when this letter was read—June 13, 1765. The Commissioners were somewhat startled by the tone which the inventor had taken. Indeed, they were rather angry. Mr. Harrison, who was in waiting, was called in. After some rather hot speaking, and after a proposal was made to Harrison which he said he would decline to accede to "so long as a drop of English blood remained in his body," he left the room. Matters were at length arranged. The Act of Parliament (5 Geo. III. cap. 20) awarded him, upon a full discovery of the principles of his time-keeper, the payment of such a sum, as with the 2500L. he had already received, would make one half of the reward; and the remaining half was to be paid when other chronometers had been made after his design, and their capabilities fully proved. He was also required to assign his four chronometers—one of which was styled a watch—to the use of the public.
Harrison at once proceeded to give full explanations of the principles of his chronometer to Dr. Maskelyne, and six other gentlemen, who had been appointed to receive them. He took his timekeeper to pieces in their presence, and deposited in their hands correct drawings of the same, with the parts, so that other skilful makers might construct similar chronometers on the same principles. Indeed, there was no difficulty in making them; after his explanations and drawings had been published. An exact copy of his last watch was made by the ingenious Mr. Kendal; and was used by Captain Cook in his three years' circumnavigation of the world, to his perfect satisfaction.
England had already inaugurated that series of scientific expeditions which were to prove so fruitful of results, and to raise her naval reputation to so great a height. In these expeditions, the officers, the sailors, and the scientific men, were constantly brought face to face with unforeseen difficulties and dangers, which brought forth their highest qualities as men. There was, however, some intermixture of narrowness in the minds of those who sent them forth. For instance, while Dr. Priestley was at Leeds, he was asked by Sir Joseph Banks to join Captain Cook's second expedition to the Southern Seas, as an astronomer. Priestley gave his assent, and made arrangements to set out. But some weeks later, Banks informed him that his appointment had been cancelled, as the Board of Longitude objected to his theology. Priestley's otherwise gentle nature was roused. "What I am, and what they are, in respect of religion," he wrote to Banks, in December, 1771, "might easily have been known before the thing was proposed to me at all. Besides, I thought that this had been a business of philosophy, and not of divinity. If, however, this be the case, I shall hold the Board of Longitude in extreme contempt."
Captain Cook was appointed to the command of the Resolution, and Captain Wallis to the command of the Adventure, in November, 1771. They proceeded to equip the ships; and amongst the other instruments taken on board Captain Cook's ship, were two timekeepers, one made by Mr. Larcum Kendal, on Mr. Harrison's principles, and the other by Mr. John Arnold, on his own. The expedition left Deptford in April, 1772; and shortly afterwards sailed for the South Seas. "Mr. Kendal's watch" is the subject of frequent notices in Captain Cook's account. At the Cape of Good Hope, it is said to have "answered beyond all expectation." Further south, in the neighbourhood of Cape Circumcision, he says, "the use of the telescope is found difficult at first, but a little practice will make it familiar. By the assistance of the watch we shall be able to discover the greatest error this method of observing the longitude at sea is liable to." It was found that Harrison's watch was more correct than Arnold's, and when near Cape Palliser in New Zealand, Cook says, "this day at noon, when we attended the winding-up of the watches, the fusee of Mr. Arnold's would not turn round, so that after several unsuccessful trials we were obliged to let it go down." From this time, complete reliance was placed upon Harrison's chronometer. Some time later, Cook says, "I must here take notice that our longitude can never be erroneous while we have so good a guide as Mr. Kendal's watch." It may be observed, that at the beginning of the voyage, observations were made by the lunar tables; but these, being found unreliable, were eventually discontinued.
To return to Harrison. He continued to be worried by official opposition. His claims were still unsatisfied. His watch at home underwent many more trials. Dr. Maskelyne, the Royal Astronomer, was charged with being unfavourable to the success of chronometers, being deeply interested in finding the longitude by lunar tables; although this method is now almost entirely superseded by the chronometer. Harrison accordingly could not get the certificate of what was due to him under the Act of Parliament. Years passed before he could obtain the remaining amount of his reward. It was not until the year 1773, or forty-five years after the commencement of his experiments, that he succeeded in obtaining it. The following is an entry in the list of supplies granted by Parliament in that year: "June 14. To John Harrison, as a further reward and encouragement over and above the sums already received by him, for his invention of a timekeeper for ascertaining the longitude at sea, and his discovery of the principles upon which the same was constructed, 8570 pounds 0s. 0d."