The New-Jersey convention have declared their late governor, William Franklin, esq. a virulent enemy to the country, and a person who may prove dangerous, and who ought to be confined in such place and manner as congress may direct; congress have ordered him to be sent under guard to governor Trumbull of Connecticut, who is to admit him to his parole; but if he refuses to give it, he is to be secured the same as other prisoners. Matters are drawing on to such a crisis, that the next letter must necessarily contain very interesting intelligence. LETTER IV. _Roxbury, Sept. 16, 1776._ Lord Dunmore has at length quitted Virginia and joined the British forces. He arrived with lord Campbell and Sir Peter Parker off Staten-Island. [August 14.] His lordship continued on the coast, and in the rivers of Virginia, till the closeness and filth of the small vessels in which the fugitives were crowded, together with the heat of the weather, the badness and scarcity of water and provisions, produced the pestilential fever, which made great havock, especially among the negroes, many of whom were swept away. When at length every place was shut against him, and neither water nor provisions were to be obtained, but at the expence of blood, it was found necessary, toward the beginning of August, to burn several of the smaller and least valuable vessels, to prevent their falling into the hands of the Americans, and to send the remainder, amounting to between forty and fifty, with the exiled friends of government, to seek shelter in Florida, Bermudas, and the West-Indies; a great number of negroes were sent at the same time to the last of these places for sale. The Virginians lost about 1000 of them in the whole, including those who were killed or died while attached to his lordship’s service. Thus have ended the hopes entertained of suppressing the opposition to government in Virginia by employing the negroes—a measure which being rather invidious than powerful, tended infinitely to inflame the discontents of the people without adding to the strength of the royal arms. The New-Jersey congress were so irritated by the plot for destroying the American army, that they used the utmost dispatch in forming their constitution, and finished it by the second of July.