Governor Stevens later enumerated 9,712 Native Americans living west of the Cascade Range. Only a few hundred white settlers occupied Puget Sound when the treaties were concluded. Seattle Indian Agent Dr. David S. Maynard (1808-1873) played a major role in securing tribal concessions.
The agreements did not secure a durable peace, and the Puget Sound area experienced several bloody clashes over the next few years. Nine settlers were killed in the White River valley in October 1855 and Seattle itself was attacked on January 26, 1856.