Complex sentence: In 1987 the railway saw its first steam locomotive, Irish Mail in steam, this was a great achievement for the line as the loco, bought at an auction ad Dinorwic slate quarry in Wales, had not had a boiler when aqquired by the railway.
Split into simpler sentences: In 1987 the railway saw its first steam locomotive, Irish Mail, in steam. This was a great achievement for the line as the loco, bought at an auction at Dinorwic slate quarry in Wales, had not had a boiler when acquired by the railway.