Andrew Fisher Brunner was an American artist active in the late 19th century. He is noted for his landcape watercolors and for his drawings, particularly those in pen and ink.
The Metropolitan Museum of Art has a nice collection of his drawings, visible online in reasonably large images. Many of these are of Venice.
He has a seemingly casual style of ink rendering that belies the solid draftsmanship on which his drawings are based.
The National Gallery of Art in Washington also has a smaller collection of some of his graphite drawings.