"As readers of 'The model-railway men' and 'Telford and the American visitor' already know, the model railway in mark's attic houses a race of miniature railway folk, led by that redoubtable engine driver of the great age of steam, Telford. Up until now, Mark has always been there to arrange about getting them food and to help them out of their difficulties. But now his family is going on holiday and they are to be left to their own devices..." --Inside front dust jacket.