But the increase of traffic as the years passed necessitated the construction of the famous spiral tunnels through or under Cathedral Mountain and Mount Ogden and the building of special bridges over the river. Leaving technical points and figures aside, it may be sufficient to say that trains entering these mountains climb or descend in a spiral way with less than half the former engine power and with the utmost degree of safety. In my observation it has been a constant delight to passengers to watch how the train loops inside these mountains and comes out at a different level from that which it entered. It is all so novel and free from danger that travellers, enjoying the sensation, are loud in their praise of the engineers and workmen who thought out and constructed these remarkable spirals through the eternal hills, even though it cost the Company over a million to make this change for the pleasure and safety of their guests over the road. Still more notable as an engineering feat is the great Connaught Tunnel, five miles long, between Glacier and Stony Creek. It is called after a well-beloved Governor-General of Canada, the Duke of Connaught, son of Queen Victoria, of immortal memory. This tunnel was built to avoid the climb over the top of the famous old Rogers Pass, through a gorge subject in winter and spring to snow-slides, against which the railway was protected by four miles and a half of heavily built snowsheds. These snowsheds were built of wood, and wood is not an everlasting material. Occasionally sections of this long shed would be carried away and all of it would show wear in the process of time. Taking this along with the heavy grade, the Company concluded to tunnel through MacDonald Mountain and solve all the problems at the same time. The construction of this double-track tunnel, the longest on this continent, as noted above, was begun in August, 1913. It took over two years “to make a hole through the mountain,” but another year saw the tunnel open for regular traffic. In addition to eliminating the snowsheds, which are not an infallible protection, the tunnel shortens the distance across the Selkirk range by over four miles, lowers the summit attained by the railway by 552 feet, and reduces track curvatures by an amount corresponding to seven complete circles. Perfect ventilation is attained by powerful fans and I have passed through the Connaught Tunnel again and again with windows open and experienced no inconvenience whatever.