the list includes vessels owned personally by the owners of pickands mather and directly by pickands mather, as well as those owned by its subsidiaries. these include some vessels owned by the interlake steamship company. this company was a subsidiary of pickands mather from the subsidiary's founding in 1894 until its spinning off as an independent corporation in 1987. it does not include vessels operated by interlake steamship since 1987. it also does not includes vessels operated by other companies prior to their merger with interlake, but does include those brought to the merger with interlake and thereafter operated by interlake.