This was pretty good for an early vampire-centric story. You can definitely attribute a lot of the themes and vampire lore to contemporary vampire fiction (attractive vampires, inviting them inside, burning in the sun, etc) I know a lot of it was plagiarized later on by other writers, and in other cases inspired and adapted by others. It is important work, even if it is lacking in a lot of ways.
It suffers a lot from telling and not showing.-