The reorganization of the medical department by Congress, including the establishment of "two Apothecaries" and their duties, was published in the _Pennsylvania Packet_ on April 15, and a front page account presenting "directions for preserving the Health of Soldiers" was featured in the next issue.[123] Dr. Potts wrote the Medical Committee in Congress on April 3, 1777: I have the Honour to enclose you a Return of the Medicines & Stores belonging to the General Hospital in the Department, which I have received from Doctor Samuel Stringer, these with what I brought with me from Philadelphia & some few I expect from Boston will be quite sufficient for this campaign. In contrast to the time when stores were short in '76, the chairman of the Medical Committee, M. Thornton, was quick to reply on April 12 that ... we are highly pleased with your having the prospect of a sufficient supply of medicines in your Department for the ensuing Campaign, & approve of the returns you have made us.[124] Valley Forge Washington's forces were defeated at Brandywine on September 11, 1777, and on September 25 the British army occupied Philadelphia. Washington, after trying without success to dislodge them by a sudden attack at Germantown on October 4, retreated to Valley Forge. Business in Philadelphia under British occupation continued much as it had under American control, except for a few missing suppliers and a few new ones. One druggist who was little in evidence after the war commenced was back in business advertising within two weeks after the British occupied Philadelphia. It was William Drewet Smith (not to be confused with William Smith) who advised "friends and customers ... that they can be supplied with Medicine and Drugs as usual, at his shop in Second-Street." To indicate that he was expecting an active business, Smith also advertised for "a person who can be well recommended for honesty and sobriety ... to attend a Druggist's Shop."[125] [Illustration: Figure 3.--Page from the Waste Book manuscript of the Christopher Marshall, Jr., and Charles Marshall apothecary shop in Philadelphia. This is the first page of the contents of a medicine chest furnished on order of the Continental Congress for the Pennsylvania 4th Battalion. Preserved at the Historical Society of Pennsylvania, in Philadelphia.] [Illustration: Figure 4.--Page from the ledger of the Greenleaf apothecary shop in Boston, showing the accounts between September 3, 1776, and May 28, 1777, with "the United American States" for outfitting ships of the Continental Navy. Preserved at the American Antiquarian Society, Worcester, Mass.]