Thanks to Doctor Nightfall for this analysis!
Erin: Sometimes, instead of a question, a reader will send me an answer. In this case, a long detailed analysis of the section of the Ripley Scroll from which we get the inscription on Alucard’s coffin. I’ve copied the full text here. Lines from the scroll are in the Old English font, explanations in the plain one. Enjoy!
[The full text, plus some additional explanation about how it links directly to Alucard.]