@ Henry; I don't mean to argue, but to a Maritime historian steam or not is a significant difference. And though I am perfectly aware that the world is full of small steam engines, the boilers that powered them are not small. I could explain why should you desire. There may be a different tradition in Europe and the UK that I'm not familiar with, but in North America I don't believe Donkey Engines were steam. And I've never heard a schoonerman use the phrase Riding on a Donkey.