Very original initial idea, and simply EXCELLENT work on all accounts.
I guess the Lady Guardian of the Grail is Mary Magdalene? Nice touch.
Maybe not coincidental, then, that the Knights Reliquar are 13: the Leader, his Lady and 11 faithful male companions?
Btw, for those wishing to play 'Gothic Horror' games in other periods than the 'traditional' Victorian era (18th C. for instance http://theminiaturespage.com/boards/msg.mv?id=276792
as already done for Strange Aeons http://anatolisgameroom.blogspot.fr/search/label/Strange%20Aeons%2018th%20century
), an exciting implication of your background history is that the Knights Reliquar, being undead for centuries at the end of the 19th C., were already 'there' long before...
Would they take sides -and then what- if in 1745 the descent of Prince Charlie was only the tip of the iceberg, echo of an 'Underworld' war between Jacobite werewolves and vampires brought from the Continent by the 'German' king?
Josephine would not look out of place / time, alternatively what about JoeK Baroness
and there is a choice of 'undead pirates officers'
for the characters in 'contemporary' dress.http://blackcatbases.com/index.php?main_page=product_info&cPath=437_599&products_id=1823http://www.alternative-armies.com/55518-B_Count_Pavlova.htm
(ca. 1745 they still have a little skin left