Samuel Smiles, Lives of the Engineers
“ By this means an immense number of trains can be worked with regularity and safety. On p. xvithe South-Eastern Railway, where the system has been brought to a state of high efficiency, it is no unusual thing during Easter week to send 600,000 passengers through the London Bridge Station alone; and on some days as many as 1200 trains a-day.While such are the expedients adopted to ensure safety, others equally ingenious are adopted to ensure speed. ”
