The Tremadoc tramway (sometimes known as the Llidiartyspytty Railway) was built by William Madocks sometime before 1842, and possibly as early as the 1830s.
In 1856 the Bangor & Portmadoc Slate & Slab company requested tenders to extend the line 2¼ miles to the Gorsedda Quarry at Glan Bwll [REF].