[From the name of the maker.] In full Whatman paper: A kind of paper, made in various qualities, used for drawings, engravings, etc.
1880. Macm. Mag., No. 245. 380. For rapid sketching, thin rough Whatman, properly stretched upon a board, is as good as any other paper.
1886. H. R. Robertson, Art of Pen-and-Ink Drawing, 37. Some old Whatman paper.