Marsh kept a detailed log during the journey. The names he bestowed were recorded by an expedition representative of the War Department and applied to official maps; they include the following:

* Forsyth Butte, named in honor of Forsyth, commander of the expedition.
* Cut Nose Butte, Chimney Rock, and Diamond Island, for their resemblance to these objects.
* Seven Sisters Islands, in remembrance of Captain Marsh's seven sisters.
* Crittenden Island, for General T. L. Crittenden,