It’s hard, drawing black. Very hard. Sparta Puss is tortoiseshell so there are a few lighter bits on her. It was even harder to draw my late, great kitteh, Bola, who was as black as a panther. It’s all down to the marks you make, varying them to delineate the different areas of the subject.
I used a Faber Castell Pitt drawing pen size S into my A5 Tate Gallery sketchbook. The model is my small cat, Sparta.
scribblah 
There’s a little bit of trickery to it!
🙂