I thought the Russell was fine but I just noticed it seemed to trail off farther than usual at the end so I thought I could be wrong. Thank you Pete. The Leigh to me looks okay but it's a sloppy graph of hers.
I was interested in getting a JJL but all to be found were scribbles a lot like that so I gave up. Didn't matter old or new, seems she's signed that way for a long time. Only thing I can comment on is that she puts down her 3 "names" like this one does, however this graph looks even more inscrutable than most so I think you'll have a hard time getting an airtight confirmation.
I know all that from the exemplars I have in my files. This one just is rushed and sloppy. The ones that are below are ones that are real Jennifer Jason Leigh graphs.