Holborn Bars stood a little to the west of Brooke Street, and close by was Middle Row, an island of houses opposite the end of Gray's Inn Road, which formed a great impediment to the traffic. The Bars were the entrance to the City, and here a toll of a penny or twopence was exacted from non-freemen who entered the City with carts or coaches. The George and Blue Boar stood on the south side of Holborn, opposite Red Lion Street, and it is said that it was here that Charles I.'s letter disclosing his intention to destroy Cromwell and Ireton was intercepted by the latter; but this is very doubtful. On Holborn Hill was the Black Swan Inn, which has been described as one of the most ancient and magnificent places for the reception of travellers in London, and which Dr. Stukeley, with fervent imagination, declared dated from the Conquest. Another ancient inn in Holborn was called the Rose. It was from here that the poet Taylor started to join Charles I. in the Isle of Wight, of which journey he says, "We took one coach, two coachmen, and four horses, And merrily from London made our courses; We wheeled the top of the heavy hill called Holborn, Up which hath been full many a sinful soul borne," which is quoted merely to show that there is a possible rhyme to Holborn. Pennant says also there was a hospital for the poor in Holborn, and a cell of the House of Clugny in France, but does not indicate their whereabouts. Before the building of the Viaduct in 1869 (see p. 54), there was a steep and toilsome descent up and down the valley of the Fleet. This was sometimes called "the Heavy Hill," as in the verse already quoted, and in consequence of the melancholy processions which frequently passed from Newgate bound Tyburn-wards, "riding in a cart up the Heavy Hill" became a euphemism for being hanged. From Farringdon Street to Fetter Lane was Holborn Hill, and Holborn proper extended from Fetter Lane to Brooke Street. In James II.'s reign Oates and Dangerfield suffered the punishment of being whipped at the cart's tail all the way along Holborn. There were Bridewell Bridge, Fleet Bridge, Fleet Lane Bridge, and Holborn Bridge across the Fleet River. Holborn Bridge was the most northerly of the four. It was a bridge of stone, serving for passengers from the west to the City by way of Newgate. The whole thoroughfare of Oxford Street and Holborn is the result of the diversion of the north highway into the City from the route by Westminster Marshes.