Very few old houses retain at the present time so large a share of the dignity and picturesqueness originally theirs, as does the homestead whose chief interest for us lies in the fact that it was the Revolutionary prison of Doctor Benjamin Church, the first-discovered traitor to the American cause. This house is on Brattle Street, at the corner of Hawthorn. Built about 1700, it came early into the possession of Jonathan Belcher, who afterward became Sir Jonathan, and from 1730 till 1741 was governor of Massachusetts and New Hampshire. Colonel John Vassall the elder was the next owner of the house, acquiring it in 1736, and somewhat later conveying it, with its adjoining estate of seven acres, to his brother, Major Henry, an officer in the militia, who died under its roof in 1769. Major Henry Vassall had married Penelope, sister of Isaac Royall, the proprietor of the beautiful place at Medford, but upon the beginning of hostilities, this sprightly widow abandoned her spacious home in such haste that she carried along with her, according to tradition, a young companion whom she had not time to restore to her friends! Such of her property as could be used by the colony forces was given in charge of Colonel Stark, while the rest was allowed to pass into Boston. The barns and roomy outbuildings were used for the storage of the colony forage. [Illustration: HOUSE WHERE DOCTOR CHURCH WAS CONFINED, CAMBRIDGE, MASS.] It is highly probable that the Widow Vassall's house at once became the American hospital, and that it was the residence, as it was certainly the prison, of Doctor Benjamin Church. Church had been placed at the head of an army hospital for the accommodation of twenty thousand men, and till this time had seemed a brave and zealous compatriot of Warren and the other leading men of the time. Soon after his appointment, he was, however, detected in secret correspondence with Gage. He had entrusted to a woman of his acquaintance a letter written in cipher to be forwarded to the British commander. This letter was found upon the girl, she was taken to headquarters, and there the contents of the fatal message were deciphered and the defection of Doctor Church established. When questioned by Washington he appeared utterly confounded, and made no attempt to vindicate himself. The letter itself did not contain any intelligence of importance, but the discovery that one, until then so high in the esteem of his countrymen, was engaged in a clandestine correspondence with the enemy was deemed sufficient evidence of guilt. Church was therefore arrested at once, and confined in a chamber looking upon Brattle Street. Some of his leisure, while here imprisoned, he employed in cutting on the door of a closet: "B CHURCH, JR."