The following Theories/WAGs are listed in this thread
http://www.jimbutcheronline.com/bb/index.php/topic,36403.0.htmlDon't know if they are good enough for inclusion but here is the run down.
1. Lord Raith planned on having a second child with Margaret, one born to have power over Outsiders.
2. Lord Raith planned on using a young Thomas as a sacrifice in a type of Accession ritual that would have made the child even more powerful.
3. Lord Raith knew Margaret was pregnant and aimed his Entropy Curse, not at her but at the baby so he could get her back.
4. Margaret found out about Lard Raith's Curse, that it would hit at Midnight of October 31st.
5. Margaret induced labor early using magic.
6. Margaret deflected the Curse from the baby to herself.
7. With Margret's death, LR gave up on the idea of using Thomas as a sacrifice, until BR.
8. Lord Raith believed both the child and the mother had died.
9. Cowl was one of Maggie's circle, traveling with her into the NeverNever.
10. While a 'Good' man produces a Starborn to oppose the Outsiders, a 'Bad' man can father a Starborn who would be a leader of the Outsiders, a link between worlds who would help them.