| RefNo | Title |
| DF/MIN/20/6/2 | Lewis, William James: Crystallographic observations book A, including glaucodote and sapphire |
| DF/MIN/20/6/5 | Lewis, William James: Crystallographic observations book III, including blende and galena |
| DF/MIN/20/6/3 | Lewis, William James: Crystallographic observations book I, including native copper and gold |
| DF/MIN/20/6/4 | Lewis, William James: Crystallographic observations book II, containing argentite, redruthite and blende |
| DF/MIN/20/6/1 | Lewis, William James: Official diary recording daily duties in the Museum |
| DF/MIN/7/80 | Rathite and Wiltshireite synonomy correspondence |
| DF/MIN/3/1/44 | Crumlin meteorite, Ireland (part 1) |
| DF/ZOO/200/22/183-183a | Lewis, William James |