A secretary bookcase is a combination of a writing desk with storage above for books or display items (often behind glass doors) and storage drawers beneath.  They were practical pieces of furniture combining beauty and functionality.  The writing desk would drop down to use and often contain small compartments for stationery, ink, pens and blotters.  They could be closed up and locked for privacy of content when not in use.

 

Burl walnut (American English) or Burr walnut (British English) is wood harvested from the base of walnut trees, where a large ball often occurs. The burl itself is actually an abnormal growth or deformity on the tree, often caused by some sort of stress such as a virus or bug infestation. When cut, the burl has a distinct appearance that can be finished to create an attractive piece of furniture or other structure. Walnut burl wood exhibits a rich dark color with deep, complex grain patterns, and is often used in crafting high-end furniture, veneers, and decorative items.