"The Three-Cornered Wheel" and "The Season of Forgiveness," both set on Ivanhoe, are collected in the first Technic Civilization Saga volume, The Van Rijn Method;
Mirkheim, with a passage set on Babur, is collected in the third volume, Rise Of The Terran Empire.
My next agendum is to reread these two stories and the relevant passage of the novel, then to summarize details of these planetary environments here on Poul Anderson's Cosmic Environments. Meanwhile, however, blog readers are of course welcome to preempt me with any information on either of these planets?
18 Oct 2014: See Ivanhoe and Babur.