Perpetuum Solitude - is a series of traditional drawings on paper based on World War 1 wounded soldiers and some of the first facial reconstruction surgeries of Dr. Harold Gilles.
First 5 drawings are 27x38 cm each and are done in pencil, while the last 3 portraits are larger at 60x80cm.
The 2 darker background ones are charcoal and the brighter background one is pencil.