20. Enginemen are strictly enjoined to =start and stop their Trains slowly=, and without a jerk, which is liable to snap the couplings and chains; and they are further warned to be careful not to shut off their steam too suddenly (except in case of danger), so as to cause a concussion of the carriages.--This rule applies more especially to =Cattle Trains=, the beasts being liable to be thrown down and injured by a sudden check. 21. No Engineman is to start his Train until the proper Signal is given: he is invariably to start with care, and to observe that he has the whole of his Train before he gets beyond the limits of the Station. 22. It is very important that Engine-Drivers use the utmost caution when shunting Waggons into sidings, so as to avoid injuring the Waggons or other property of the Company. 23. Enginemen in bringing up their Trains are to pay particular attention to the state of the =weather= and the condition of the =Rails=, as well as to the length of the Train: and these circumstances must have due weight in determining when to shut off the Steam. Stations must not be entered so rapidly as to require a violent application of the Breaks, and any Engineman overrunning the Station will be reported. 24. Enginemen and others are required to be careful in turning their Engines on the Tables, so as not to =swing= them round rapidly. 25. Engines running alone, or taking luggage or empty carriages, must not exceed a speed of =20= miles an hour without distinct orders in each case, or some urgent necessity. 26. Enginemen and Firemen are to pay immediate attention to all =Signals=, whether the cause of the Signal is known to them or not; and any Engineman neglecting to obey a Signal is liable to immediate dismissal from the Company’s service. The Engineman must not, however, =trust to Signals=, but on all occasions be vigilant and cautious, and on no account be running before the time specified in his Time-Table. He is also to obey the Special orders of the Officers in charge of Stations, when required for the Company’s service. 27. Whenever he sees the =Red Signal=, or any other which he understands to be a Signal to stop, he is to bring his Engine to a stand close to the Signal, and on no account to pass it. 28. In addition to the usual Red Signals, the Police have orders to place =Detonators= on the Rails in foggy weather, and every Engineman, when he hears a Detonating Signal, is to bring his Engine to a stand as quickly as possible. The Enginemen also are supplied with these Signals to be used in the same manner. (See _Rule for Fog Signals_.) 29. =Ballast= Engines are prohibited from passing along the Main Line in a =fog=, except when authorised to do so under special circumstances.