On a dark night every autumn, a grey-haired man comes out from Lake Ülemiste, goes down the hill to the gates of the town of Tallinn and asks the gatekeeper: “Has the town already been completed or is there still something to be built?”
Now, as in bigger towns, there is never a break in the building work, and even if no new houses are in progress then there are at least repairs or alterations going on at old ones. So there is never a time when all builders would be idle. And if it should once happen that all building work really stands still this must be disclosed to the man from the lake will get to know about it. Therefore the guards at the gates have been given straight orders to always give the same reply to the old man:” The town is far from being completed, there are many houses to be built yet, and it will take many years before all work is finished
Then the old man will shake his head angrily, mumble some things the gatekeeper doesn’t understand and go back to, his permanent dwelling , Lake Ülemiste.
But if someone should accidentally say in reply to the old man’s question that there is no more building to be done in the town of Tallinn, this would that in that very same hour Lake Ülemiste would fall with all its waters from the hill of upon the town and flood it.