I mixed a wash with some old sepia ink I had and tried adding that to the ink bottle sketch. Changes in tone were just down to layers. I could have added more layers, I guess. I went over a few edges with a 4B pencil.
![Ink bottle](https://devyse.co.uk/wp-content/uploads/2022/01/20220119-1024x911.jpg)
Again, I need to improve my ellipses.