I always had this question about this part in both the color version and the BW one: Which planet were Erma and Tavas on at the time? As far as I can tell, I don't think it was Dornthant since she didn't return there until 5 years later, and I don't think Tavas was originally from there either.
I don't recall at the moment, but I have it written down somewhere. I need to get my files related to all this better organized, in no small part to get the story up and running again, as well as other things...
Color Special page 4