More train stuff - Durango & Silverton

This sketch kept me busy and distracted a few years back while I waited for my truck to be repaired.  It is of a another narrow gauge train.  This one is the Durango and Silverton Line out of Durango, Colorado.  Until the steam engine was invented no one traveled faster than anyone else for a millennia or more.  Traveling on horse back was your only option for ground transport.  Then the steam engine could have you traveling consistently at at least 30 mph.