From 1787 to 1793 a group of Bostonians plied the sea otter pelt trade between the northwestern coast of the North American continent and Canton, China. By chance, in May of 1792, their captain, Captain Robert Gray discovered the Columbia River, thereby feeding the popular belief in a transcontinental river and strengthening subsequent American claims to the Pacific Northwest. Presented here is a previously unpublished portion of First Mate Robert Haswell's log of the second voyage. This portion spans the dates October 3, 179 2 through May 2 6, 1793 and records the voyage from the completion of trade in the Pacific Northwest until the Columbia Rediviva's arrival in St. Helena. It has been lightly annotated and placed within the context of the subsequent use by statesmen and scholars of Columbia Rediviva records.