A watercolor study from Rudolf Hünlich’s sketch book, one of several tree and forest studies. Rudolf Hünlich was an uncle of my grandfather Rolf Keller (a brother of his mother). He was a professional graphics artist working as a xylographer. He was only 24 years old when he died of a lung disease. I don’t have the exact dates of his life. I guess the sketch book is from the 1870s or 1880s, but I don’t know exactly. Here is another drawing from that sketch book.