About 30 or 35 years ago my parents were asked by The University of Manitoba for permission to dig a 1 foot trench near the river which bounded one side of their property to look for artifacts of Canadian aboriginals. The plan was do do a long trench across twenty or thirty houses. They answered the letter with "of course you can" or something like that. Got a letter back a couple months later. It thanked them, but said that they were the only ones that answered in the affirmative. Apparently all their neighbours cared more about protecting their future right to build a shed over the priceless history of the people who lived there first.