sentences:  The stable of Beyer, Peacock locomotives carry standard whistles, these can be broken down simply as high, medium and low.The medium tone of whistle is more commonplace for the simple reason that whenever a new boiler was supplied it came with a whistle.The higher "pea" whistle on the pre-1905 locomotives also has two variants, with 1-6 being higher than 7-9 and it was the distinctive shrill original whistle that No.