The letter also informed Franklin that the first opportunity that they had of sending a parcel to Paris he might expect all their shades; and expressed her gratitude to Mr. Jones for undertaking the care of her letter, and giving her an opportunity of assuring Franklin how much she did and ever should continue to love him.

Catherine Ray was not far wrong when she spoke of Franklin as a conjurer. Catherine Shipley's letter to him, after she had parted with him at Southampton, though without the romantic flush of these two letters, spoke the same general language of deep-seated affection. She was quite provoked with herself, she said, when she got to Southampton that she had not thought of something, such as a pincushion, to leave with him, that might have been useful to him during the voyage to remind him of her. "Did you ever taste the ginger cake," she asked, "and think it had belonged to your fellow-traveller? In short, I want some excuse for asking whether you ever think about me." And from this letter it appears that he had a place in the hearts of Emily and Betsey too. She had had a letter from Emily, Catherine further said, the night after she got home, to inquire whether his stay at Southampton would allow time for her coming to see him. Betsey regretted much that she had lost that happiness, and the writer had written to dear Georgiana a long account of him, for she knew every circumstance would be interesting to her. "Indeed, my dear sir," the letter ended, "from my father and mother down to their youngest child, we all respect and love you."[34]

When Franklin was told by Georgiana that Sir John Pringle was pinched by poverty, and looked ill, he must have been sorely distressed; for Sir John he once described as his "steady, good friend." A pupil of Boerhaave, a high authority upon the application of sanitary science to the prevention of dysentery and hospital fevers, physician to the Queen, and President of the Royal Society, Dr. Pringle was one of the distinguished men of his time. What churchmen were to the preservation of classical learning, before teaching became a special calling, physicians were to general scientific knowledge before science became such; and, among these physicians, he occupied an honorable position.[35] "His speech in giving the last medal, (of the Royal Society) on the subject of the discoveries relating to the air," Franklin wrote to Jan Ingenhousz, "did him great honour." He was quite unlike the courtiers who sought to convince King Canute that he could stay the incoming tide by his command, as George III. found out when he asked him, after the outbreak of the American Revolution, to pronounce an opinion in favor of the substitution of blunt for pointed lightning rods on Kew Palace. The laws of nature, Sir John hinted, were not changeable at royal pleasure, but positions of honor and profit he soon learnt, if he did not know it before, were; for he fell into such disfavor with the King that he had to resign as President of the Royal Society, and was deprived of his post as physician to the Queen. The circumstances in which his disgrace originated leave us at but little loss to understand why the King should have become such a dogged partisan of blunt conductors. Prior to the Revolution, Franklin had been consulted by the British Board of Ordnance as to the best means of protecting the arsenals at Purfleet from lightning, and, after he had visited the powder magazine there, the Royal Society, too, was asked by the Board for its opinion. The Society accordingly appointed a committee of learned men, including Cavendish and Franklin, to make a report on the subject. All of the committee except Benjamin Wilson, who dissented, reported in favor of pointed conductors as against blunt ones, and Franklin, the inventor of pointed lightning rods, drew up the report. The scientific controversy that followed soon assumed a political character, when Franklin dropped the philosophical task of snatching the lightning from the skies for the rebellious task of snatching the sceptre from a tyrant. When he heard that George III. was, like Ajax, obstinate enough to defy even the lightning, he wrote to an unknown correspondent:

The King's changing his pointed conductors for blunt ones is, therefore, a matter of small importance to me. If I had a wish about it, it would be that he had rejected them altogether as ineffectual. For it is only since he thought himself and family safe from the thunder of Heaven, that he dared to use his own thunder in destroying his innocent subjects.

Dr. Ingenhousz, however, was not so self-contained, and made such an angry attack on Wilson that Franklin, who invariably relied in such cases upon silence and the principle that Truth is a cat with nine lives to defend him, laughingly remarked, "He seems as much heated about this one point, as the Jansenists and Molinists were about the five." As for King George, he had at least the satisfaction of realizing that his people still had a ready fund of wit for timely use. One homely couplet of the period, referring to Franklin's famous kite, ran in this way:

"He with a kite drew lightning from the sky,
And like a kite he pecked King George's eye."

Another more polished poet penned these neat lines:

"While you, great George, for knowledge hunt,
And sharp conductors change for blunt,
The Empire's out of joint.
Franklin another course pursues
And all your thunder heedless views
By keeping to the point."

If we may believe Franklin, Sir John held the efficacy of the healing art in very moderate esteem. The reader has already been told of the humorous manner in which he let it be known that, in his opinion, of the two classes of practitioners, old women and regular physicians, the former had done the most to save the honor of the profession. Franklin also informed Dr. Rush that Sir John "once told him 92 fevers out of 100 cured themselves, 4 were cured by Art, and 4 proved fatal." But many people must have had a more favorable opinion of the professional value of Sir John than Sir John himself had, for his "Conversations" were in high repute. On this point, there is some evidence in a letter from Franklin to Dr. Thomas Bond, who was desirous of giving his son Richard the benefit of a foreign medical education. Referring to Sir John, Franklin wrote:

Every Wednesday Evening he admits young Physicians and Surgeons to a Conversation at his House, which is thought very improving to them. I will endeavour to introduce your Son there when he comes to London. And to tell you frankly my Opinion, I suspect there is more valuable knowledge in Physic to be learnt from the honest candid Observations of an old Practitioner, who is past all desire of more Business, having made his Fortune, who has none of the Professional Interest in keeping up a Parade of Science to draw Pupils, and who by Experience has discovered the Inefficacy of most Remedies and Modes of Practice, than from all the formal Lectures of all the Universities upon Earth.