Work No. 4D—U.K.A passenger subway, including a lift shaft, commencing by a junction with the cross-passage (Work No. 4C) beneath a point 35 metres north-west of the junction of Caledonian Road with Pentonville Road, passing south-westwards to a junction with the passenger subway (Work No. 4A) at its termination and terminating by a junction with the cross-passage (Work No. 4E) beneath a point 55 metres west of that road junction;