1. The official map of Lewis & Clark Co., Montana compiled from the latest official records by order of the Board of County Commissioners / [cartographic material] Yale Public content 1907. 2014-08-06T15:58:45Z. 2023-10-25T17:04:31Z. Van Hook, John C., cartographer. Lithographed by Lord Baltimore Press. English. Public. Lewis and Clark County (Mont.).