9. At the junction with the Midland at Rugby--the Bedford at Bletchley--the Aylesbury at Cheddington--the Peterborough at Blisworth--the Leamington at Coventry--the Manchester and the Chester at Crewe--the Macclesfield at Cheadle, where Stationary Signals are placed, the Policeman is to keep the Red Signal always turned on to the =Branch Line=, to prevent an Engine passing to the Main Line until he has ascertained that the Main Line is clear, when he is to turn the Signal off the Branch and on to the Main Line. =Note.=--The Trent Valley is henceforth to be considered the =Main= Line, and the Rugby and Birmingham, and Stafford and Birmingham, the Branches. 10. Every Engineman on a Branch Line must bring his Engine to a stand in foggy weather =before= he reaches the Junction-points, and not enter on the Main Line till he shall have ascertained how long the preceding Train has passed; the =Policeman= is to give all the information required. 11. Policemen are hereby apprised that, except in cases of emergency, none but Regular Trains are to be permitted to travel in a =FOG=; and on these occasions when a Train stops at a Station, the Auxiliary Signals must always be used, as shown by Rule 13, page 165. 12. Policemen must also take notice, that, to avoid risk of collision on Single Lines, no extra Engine, with or without a Train, will be allowed to pass along the Line without =previous notice=. 13. Every Policeman is supplied with =Detonating= Signals to place on the Rails in foggy weather, and he is on these occasions to use them in addition to the ordinary Red Signal. (_See Regulations for Use of Fog Signals._) 14. Every Policeman is responsible for his Stationary as well as Hand Signal Lamp being well =trimmed=, and showing a clear and distinct light. 15. The Policemen generally are not to allow strangers to =trespass= on the Line without written authority, and they are to report any occurrence of this nature to their Inspector. They will also respect any orders which the officers in charge of Stations may think necessary. 16. On a Policeman stopping a Train at the entrance to one of the long Tunnels, from another Train having passed within =ten= minutes, he is not to detain the Train beyond =two= minutes, but simply to inform the Engineman and Guard of the character of the Train in advance, and the time that has elapsed since it passed. 17. Should a Train issue from one of the long Tunnels, at which Police are stationed, without the =Tail Lamp= on the last carriage, the Policeman on duty is immediately to walk back through the Tunnel with his lamp to ascertain whether a carriage has not been left behind, and, should this be the case, he is then to go on to the other end to instruct the Policeman there stationed to put on his Red Signal to stop any Engine from entering the Tunnel.