We have a map of the voyage in the Rough Guide to Evolution, but the map has to be taken as approximate, given how difficult it is to catch all the to-ing and fro-ing that the Beagle did along the coastline of South America on a map that shows the whole world. However, there was one feature that caught my eye when the map returned from the cartographers: a wiggle, as the Beagle sailed away from the coastline between Santiago and Concepcion to encircle the Juan Fernández Islands. When I checked other maps of the voyage, some have the wiggle...
For example, this one from the Darwin Day website:
...and the original map from The Beagle Diary publication that Karen referenced.
But some do not, including Karen's and the one from Darwin's Journal of Researches (aka Voyage of the Beagle).
From a quick look around, I have not been able to find any reference to this trip around the Juan Fernández islands in the text of the Beagle Diary or Journal of Researches.
Karen, or anyone else, can you shed light on this puzzling wiggle?!