Linnæus travelled more than three thousand miles that summer through a largely unknown country, enduring, he tells us, more hardships and dangers than in all his subsequent travels. Again and again he nearly lost his life in swollen mountain streams, for he would not wait until danger from the spring freshets was over. Once he was shot at as he was gathering plants on a hillside, but happily the Finn who did it was not a good marksman. Fish and reindeer milk were his food, a pestilent plague of flies his worst trouble. But, he says in his account of the trip, which is as fascinating a report of a scientific expedition as was ever penned, they were good for something, after all, for the migrating birds fed on them. From his camps on lake or river bank he saw the water covered far and near with swarms of ducks and geese. The Laplander’s larder was easily stocked.
He came back from the dangers of the wild with a reputation that was clinched by his book “The Flora of Lapland,” to find the dragon of professional jealousy rampant still at Upsala. His enemy, Rosén, persuaded the senate of the university to adopt a rule that no un-degreed man should lecture there to the prejudice of the regularly appointed instructors. Tradition has it that Linnæus flew into a passion at that and drew upon Rosén, and there might have been one regular less but for the interference of bystanders. It may be true, though it is not like him. Men wore side-arms in those days just as some people carry pistols in their hip-pockets to-day, and with as little sense. At least they had the defence, such as it was, that it was the fashion. However, it made an end of Linnæus at Upsala for the time. He sought a professorship at Lund, but another got it. Then he led an expedition of his former students into the Dalecarlia mountains and so he got to Falun, where Baron Reuterholm, one of Sweden’s copper magnates, was seeking a guide for his two sons through the region where his mines were.
Linnæus was not merely a botanist, but an all around expert in natural science. He took charge of the boys and, when the trip was ended, started a school at Falun, where he taught mineralogy. It had been hit or miss with the miners up till then. There was neither science nor system in their work. What every day experience or the test of fire had taught a prospector, in delving among the rocks, was all there was of it. Linnæus was getting things upon a scientific basis, when he met and fell in love with the handsome daughter of Dr. Moræus. The young people would marry, but the doctor, though he liked the mineralogist, would not hear of it till he could support a wife. So he gave him three years in which to go abroad and get a degree that would give him the right to practise medicine anywhere in Sweden. The doctor’s daughter gave him a hundred dollars she had saved, and her promise to wait for him.
He went to Harderwyk in Holland and got his degree at the university there on the strength of a thesis on the cause of malarial fever, with the conclusions of which the learned doctors did not agree; but they granted the diploma for the clever way in which he defended it. On the way down he tarried in Hamburg long enough to give the good burghers a severe jolt. They had a seven-headed serpent that was one of the wonders of the town. The keen sight of the young naturalist detected the fraud at once; the heads were weasels’ heads, covered with serpent’s skin and cunningly sewed on the head of the reptile. The shape of the jaws betrayed the trick. But the Hamburgers were not grateful. The serpent was an asset. There was a mortgage on it of ten thousand marks; now it was not worth a hundred. They took it very ill, and Linnæus found himself suddenly so unpopular that he was glad to get out of town overnight. What became of the serpent history does not record.
Linnæus had carried more than his thesis on malarial fever with him to Holland. At the bottom of his trunk were the manuscripts of two books on botany which, he told his sweetheart on parting, would yet make him famous. Probably she shook her head at that. Pills and powders, and broken legs to set, were more to her way of thinking, and her father’s, too. If only he had patients, fame might take care of itself. But now he put them both to shame. At Leyden he found friends who brought out his first book, “Systema Naturæ,” in which he divides all nature into the three kingdoms known to every child since. It was hardly more than a small pamphlet, but it laid the foundation for his later fame. To the enlarged tenth edition zoölogists point back to this day as to the bed-rock on which they built their science. The first was quickly followed by another, and yet another. Seven large volumes bearing his name had come from the press before he set sail for home, a whole library in botany, and a new botany at that, so simple and sensible that the world adopted it at once.
Dr. Hermann Boerhaave was at that time the most famous physician in Europe. He was also the greatest authority on systematic botany. Great men flocked to his door, but the testy old Dutchman let them wait until it suited him to receive them. Peter the Great had to cool his heels in his waiting-room two long hours before his turn came. Linnæus he would not see at all—until he sent him a copy of his book. Then he shut the door against all others and summoned the author. The two walked through his garden, and the old doctor pointed proudly to a tree which was very rare, he said, and not in any of the books. Yes, said Linnæus, it was in Vaillant’s. The doctor knew better; he had annotated Vaillant’s botany himself, and it was not there. Linnæus insisted, and the doctor, in a temper, went for the book to show him. But there it was; Linnæus was right. Nothing would do then but he must stay in Holland. Linnæus demurred; he could not afford it. But Dr. Boerhaave knew a way out of that. He had for a patient Burgomaster Cliffort, a rich old hypochondriac with whom he could do nothing because he would insist on living high and taking too little exercise. When he came again he told him that what he needed was a physician in daily attendance upon him, and handed him over to Linnæus.
“He will fix your diet and fix your garden, too,” was his prescription. The Burgomaster was a famous collector and had a wondrous garden that was the apple of his eye. He took Linnæus into his house and gave him a ducat a day for writing his menu and cataloguing his collection. That was where his books grew, and the biggest and finest of them was “Hortus Cliffortianus,” the account of his patron’s garden.
Armed with letters from Dr. Boerhaave and the Burgomaster, he took one stronghold of professional prejudice after another. Not without a siege. One of them refused flatly to surrender. That was Sir Hans Sloan, the great English naturalist, to whom Dr. Boerhaave wrote in a letter that is preserved in the British Museum: “Linnæus, who bears this letter, is alone worthy of seeing you, alone worthy of being seen by you. He who shall see you both together shall see two men whose like will scarce ever be found in the world.” And the doctor was no flatterer, as may be inferred from his treatment of Peter the Great. But the aged baronet had had his own way so long, and was so well pleased with it, that he would have nothing to do with Linnæus. At Oxford the learned professor Dillenius received him with no better grace. “This,” he said aside to a friend, “is the young man who confounds all botany,” and he took him rather reluctantly into his garden. A plant that was new to him attracted Linnæus’ attention and he asked to what family it belonged.
“That is more than you can tell me,” was the curt answer.
“I can, if you will let me pluck a flower and examine it.”