Work No. 20A—A railway (1,111 metres in length), forming sidings of the Gravesend and Higham Railway at Hoo Junction, commencing by a junction with that railway on the eastern side of the Queens Farm Road level crossing on that railway, passing eastwards on the northern side of that railway, then north-eastwards on the southern side of the Grain Branch of that railway and terminating at a point 120 metres south of the south-western abutment of the bridge carrying that railway over the former Thames and Medway Canal;