Medieval Cambridge lay, as our Cambridge still lies, east of the river, which flowed in a course more or less corresponding to its present direction. It was enclosed by the King’s Ditch, a stream at a tangent to the main river. This started from the Mill Pool at the bottom of Silver Street, and was crossed by Trumpington Street at the Trumpington Gate, close to Pembroke. In fact, it followed the present Mill Lane and Downing Street pretty closely, keeping to the left, until it reached Barnwell Gate at the bottom of Petty Cury. From Barnwell Gate it followed the present Hobson Street, ran across Sidney Gardens and down Park Street, skirted Midsummer Common and rejoined the Cam about a hundred and fifty yards below Magdalene Bridge. Within this elliptic space the old town was contained. If you stood at the Round Church, you would see the two familiar main thoroughfares separate as they do to-day. That to the left, Bridge Street and Sidney Street, was called Conduit Street: it led to the King’s Ditch at Barnwell Gate. That to the right, St John’s Street and Trinity Street, led to the principal medieval foundations. On the right hand of it was the Hospital of St John; on the left the Jewry and All Saints’ Church, with its tower projecting over the roadway, like St John Maddermarket’s at Norwich. Just beyond on the right was King’s Hall, with King’s Hall Lane leading to the river. The next turning, St Michael’s Lane, the present Trinity Lane, led in the same direction to Garret Hostel Bridge. In St Michael’s Lane was Michael House, and St Michael’s and King’s Hall Lanes were connected by the narrow and dirty street called Foul Lane. These two colleges and the tortuous lanes connecting them occupied the site of Trinity. The main street, after passing St Michael’s Church, came to Great St Mary’s Church, and proceeded along King’s Parade as High Street. On either side of this thoroughfare was an indiscriminate mass of houses—the great court of King’s did not exist. Its site was then a labyrinth of narrow alleys and beetling tenements. A winding lane led across the space now occupied by the lawn east of King’s Chapel, to the Schools, and skirting them, ran into the street leading from Michael House to the Mill Pool, called Milne Street. Of this street, which passed Clare and crossed King’s where Gibbs’ building stands, we still preserve the original course in Queen’s Lane. It was connected with the parallel High Street by Piron Lane, which occupied the north side of the court at King’s, and St Austin’s Lane, which was the modern King’s Lane. Several lanes led from Milne Street down to the river. Milne Street was terminated by Small Bridges Street, now Silver Street, which crossed the river from Newnham and joined High Street at St Botolph’s Church.