It is amazing that such beautiful and complex drawing can be done with simple pen, you created beautiful texture with cross hatching, liked to watch the whole process and it is nice how you paid attention to the direction of light and shadows. Like the way you made the branches of the trees, absolutely enjoyable and it is really good tutorial. I can understand that is time consuming but you wanted to do details and as you mentioned yourself if one enjoying it then you never notice how long it took.