Know the ropes

A traveller from Pontypridd to Llantrisant, not knowing the ropes, would naturally travel to the station of that name, only to find himself at Pont-y-Clun, two miles distant, and probably would not be at all soothed to discover that, had he alighted at the previous station (known as Cross Inn), he would have been within half a mile of his objective. [the station at Pontyclun was named Llantrisant before it closed, it later reopened as Pontyclun]