Dr. Franklin received the thanks of the Assembly of Pennsylvania, "as well for the faithful discharge of his duty to that province in particular, as for the many and important services done to America in general during his residence in Great Britain." A compensation of 5000l., Pennsylvania currency, was also decreed him for his service during six years.
During his absence he had been annually elected member of the Assembly. On his return to Pennsylvania he again took his seat in this body, and continued a steady defender of the liberties of the people.
In December, 1762, a circumstance which caused great alarm in the province took place. A number of Indians had resided in the county of Lancaster, and conducted themselves uniformly as friends to the white inhabitants. Repeated depredations on the frontiers had exasperated the inhabitants to such a degree, that they determined on revenge upon every Indian. A number of persons, to the amount of about 120, principally inhabitants of Donegal and Peckstang, or Paxton, townships, in the county of York, assembled, and, mounted on horseback, proceeded to the settlement of these harmless and defenceless Indians, whose number had now been reduced to about twenty. The Indians received intelligence of the attack which was intended against them, but disbelieved it. Considering the white people as their friends, they apprehended no danger from them. When the party arrived at the Indian settlement, they found only some women and children, and a few old men, the rest being absent at work. They murdered all whom they found, and among others the chief Shaheas, who had been always distinguished for his friendship to the whites. This bloody deed excited much indignation in the well-disposed part of the community.
The remainder of these unfortunate Indians, who, by absence, had escaped the massacre, were conducted to Lancaster, and lodged in the jail as a place of security. The governor issued a proclamation, expressing the strongest disapprobation of the action, offering a reward for the discovery of the perpetrators of the deed, and prohibiting all injuries to the peaceable Indians in future. But, notwithstanding this, a party of the same men shortly after marched to Lancaster, broke open the jail, and inhumanly butchered the innocent Indians who had been placed there for security. Another proclamation was issued, but it had no effect. A detachment marched down to Philadelphia for the express purpose of murdering some friendly Indians, who had been removed to the city for safety. A number of the citizens armed in their defence. The Quakers, whose principles are opposed to fighting, even in their own defence, were most active upon this occasion. The rioters came to Germantown. The governor fled for safety to the house of Dr. Franklin, who, with some others, advanced to meet the Paxton boys, as they were called, and had influence enough to prevail upon them to relinquish their undertaking and return to their homes.
The disputes between the proprietaries and the Assembly, which for a time had subsided, were again revived. The proprietaries were dissatisfied with the concessions made in favour of the people, and made great struggles to recover the privilege of exempting their estates from taxation, which they had been induced to give up.
In 1763 the Assembly passed a militia bill, to which the governor refused to give his assent, unless the Assembly would agree to certain amendments which he proposed. These consisted in increasing the fines, and, in some cases, substituting death for fines. He wished, too, that the officers should be appointed altogether by himself, and not be nominated by the people, as the bill had proposed. These amendments the Assembly considered as inconsistent with the spirit of liberty. They would not adopt them; the governor was obstinate, and the bill was lost.
These, and various other circumstances, increased the uneasiness which subsisted between the proprietaries and the Assembly, to such a degree that, in 1764, a petition to the king was agreed to by the house, praying an alteration from a proprietary to a regal government. Great opposition was made to this measure, not only in the house, but in the public prints. A speech of Mr. Dickenson on the subject was published, with a preface by Dr. Smith, in which great pains were taken to show the impropriety and impolicy of this proceeding. A speech of Mr. Golloway, in reply to Mr. Dickenson, was published, accompanied with a preface by Dr. Franklin, in which he ably opposed the principles laid down in the preface to Mr. Dickenson's speech. This application to the throne produced no effect. The proprietary government was still continued.
At the election for a new Assembly, in the fall of 1764, the friends of the proprietaries made great exertions to exclude those of the adverse party; and they obtained a small majority in the city of Philadelphia. Franklin now lost his seat in the house, which he had held for fourteen years. On the meeting of the Assembly it appeared that there was still a decided majority of Franklin's friends. He was immediately appointed provincial agent, to the great chagrin of his enemies, who made a solemn protest against this appointment: which was refused admission upon the minutes, as being unprecedented. It was, however, published in the papers, and produced a spirited reply from him, just before his departure for England.
The disturbances produced in America by Mr. Grenville's stamp-act, and the opposition made to it, are well known. Under the Marquis of Rockingham's administration, it appeared expedient to endeavour to calm the minds of the colonists, and the repeal of the odious tax was contemplated. Among other means of collecting information on the disposition of the people to submit to it, Dr. Franklin was called to the bar of the House of Commons. The examination which he here underwent was published, and contains a striking proof of the extent and accuracy of his information, and the facility with which he communicated his sentiments. He represented facts in so strong a point of view, that the expediency of the act must have appeared clear to every unprejudiced mind. The act, after some opposition, was repealed, about a year after it was enacted, and before it had ever been carried into execution.
In the year 1766, he made a visit to Holland and Germany, and received the greatest marks of attention from men of science. In his passage through Holland, he learned from the watermen the effect which a diminution of the quantity of water in canals has in impeding the progress of boats. Upon his return to England, he was led to make a number of experiments, all of which tended to confirm the observation. These, with an explanation of the phenomenon, he communicated in a letter to his friend, Sir John Pringle, which is among his philosophical pieces.