“Bores have been put down at various parts of the line, the positions of which are shown on the small scale plan, and a copy of the journals of these bores may be seen at the engineer's office, but the company does not in any way guarantee their accuracy, or that they will be a guide to the nature of the surrounding strata. Contractors must therefore satisfy themselves as to the nature of the strata, as the company will not hold themselves liable for any claim that may be made against them on account of any inaccuracy in the journals of the bores.