[Apostle Wilford Woodruff Journal] 7th We are still at the bend. The tide Here rises & falls about 50 feet each tide. At the turn of the tide it comes in with a great swell [reach?] from 7 to 10 feet deep. It is called the bore. It often destroys ships when they are in the bore. This is the reason why boats cannot go out & in bore rivers ownly at High tides. The bore came in to day at half past 11 oclok & we all left the bend on board of the Steemer at 2 oclok & rode all day & night.
[source: Wilford Woodruff's Journal: 1833-1898 Typescript, Volumes 1-9, Edited by Scott G. Kenney, Signature Books 1993, http://amzn.to/newmormonstudies]