By fy1 (Formeryooper1) on Monday, February 17, 2014 - 11:43 am:
Found one the references.
http://www.eagleharborweb.net/archive/update5.htm
Ice Walking(2/22/03)
As I look out across ice stretching to the horizon, I think of the either brave or foolhardy souls who in the days of Isle Royale’s copper mining and timbering boomlet, reportedly walked from the island across the frozen lake to the Keweenaw. One of these men of lore was Eagle Harbor’s Richard Harvey, the great granddaddy of Susan Adams and Becky Markee and founder of The Harvey Boarding House, the beautifully maintained old home that sits kiddy-corner from the Shoreline Resort. Richard's’ s obituary tells of his youthful trek across the ice, with three other lads and two horses, from Isle Royale to Copper Harbor - a distance of over 50 miles! I doubt if they were riding the horses, and given the rough ice they must have encountered, it’s not likely they traveled more than two, perhaps three, miles per hour – meaning they were out on the lake for 17 to 25 hours. In mid winter, all but about nine of those hours in winter darkness. And no satellite photos to assure them the ice was solid. Incredible!