Redtree albums.
They manufacture and sell high-end, fine-art photo albums for professional photographers.

They were looking for a hand drawn-like sketches of their products in a pattern form (in black or light gray) to use as the top cover of their white presentation boxes or for custom printed tissue paper.
Examples of their products: http://www.redtreealbums.com
https://www.pinterest.com/redtreealbums/