https://www.ttlg.com/forums/showthread.php?t=149139

is that news true? Lady Rowena (A. M. I.) will be remembered

Sadly, yes. But there is also more in the readme of this mission:

This is the first of a 3-mission campaign that Lady Rowena was working on when she passed away. Luckily a benefactor who had been testing it decided it should be released, but the other two missions are lost. We do have some texts and the briefing for the second mission; these are included in a file named Unused Books.zip in the mission archive. Lady Rowena posted a handful of screenshots from the lost missions on TTLG; we have included those in an Easter egg area. Can you find it?