I have just re-read Return of the Native, and a very fine book it is and couldn’t have been written by anyone else.
SPOILER ALERT
However I wasn’t clear whether Eustacia commits suicide or just falls into the weir. I know she’s been suicidal, but we’ve been told she’s got over it. I know she’s got ready to flee and then realised (silly soul) that she hasn’t any money. But she isn't described, I thought, as more desperate than she has been. I knew she was due to drown. But we didn’t have any description of her falling in.
On the other hand, the whole book is a stream of repeated unfortunate accidents from when Wildeve finds he’s got the wrong licence onwards. (I found myself screaming internally “No, Christian, don’t do it!). It would be in keeping with everyone’s bad luck if she just slipped.
Or is Hardy leaving it deliberately ambiguous. Or is suicide, like sex, something the Victorian novel writer just couldn’t describe?