Karin,
That is a lovely drawing.
If I might make a comment, I would say, use a better paper for your studies, so you have the drawing to sell. Your drawings deserve it.
I use
www.twinrocker.com for my paper. They have all kinds of handmade beautiful pigmented paper in sizes large and small. Some of it quite antique looking. Another resource I use is
www.nycentralart.com. They have a vast catalogue of papers. You can purchase sample booklets for about $5.
My pastel work is large so I have to predraw everything before I order a panel made. I do my drawings about 1/2 size and then make a line tracing be enlarged to a place that does blowups (shacos) of architectural drawings. Then I can sell the study.
Will you be at the Copley show on the 22nd? Hope to see you there with the Pulidos.
Sincerely,