Why is there no relative pronoun in Bronte's sentence?
Solution 1:
The construction is vaguely familiar to me living in Scotland. On searching (with some difficulty) I find similar examples in:
Ulsterscotsentertainments
Page 82
Dear mother, here is a sight will make thee well again
The Spartan Dame, 1721
Page 66This is a sight will make me old indeed
These examples, and others, are quite old, suggesting an archaism that might be based on a simple ellipsis, omitting that. Not unreasonable, as the juxtaposition of noun and future verb makes unambiguously clear the connection of the two.