31. Knife Bookmark Museum number: 1-203155 Object class: Knives (stone tools) Collector: Harry Starr Riddell Jr. Collection place: CA-Las-8, Lassen County, California
32. Knife Bookmark Museum number: 1-203125 Object class: Knives (stone tools) Collector: Harry Starr Riddell Jr. Collection place: CA-Las-8, Lassen County, California
33. Knife Bookmark Museum number: 1-203072 Object class: Knives (stone tools) Collector: Harry Starr Riddell Jr. Collection place: CA-Las-10, Buckhorn Canyon, Lassen County Collection date: 1940
34. Knife Bookmark Museum number: 1-203179 Object class: Knives (stone tools) Collector: Franklin Fenenga Collection place: CA-Las-8, Lassen County, California
35. Knife Bookmark Museum number: 1-202961 Object class: Knives (stone tools) Collector: Francis A. Riddell Collection place: CA-Las-10, Buckhorn Canyon, Lassen County Collection date: 1940
36. Knife Bookmark Museum number: 1-203153 Object class: Knives (stone tools) Collector: Harry Starr Riddell Jr. Collection place: CA-Las-8, Lassen County, California
37. Knife Bookmark Museum number: 1-203216 Object class: Knives (stone tools) Collector: Francis A. Riddell and Harry Starr Riddell Jr. Collection place: Madeline Plains, Lassen County, California Collection date: 1940
38. Knife Bookmark Museum number: 1-203139 Object class: Knives (stone tools) Collector: Harry Starr Riddell Jr. Collection place: CA-Las-8, Lassen County, California
39. Knife Bookmark Museum number: 1-239515 Object class: Knives (stone tools) Collector: Francis A. Riddell, Harry Starr Riddell Sr., and Kitty Joaquin Collection place: CA-Las-9 (Madeline Dunes site), Madeline Plains, Lassen County Collection date: unknown
40. Knife Bookmark Museum number: 1-202960 Object class: Knives (stone tools) Collector: Francis A. Riddell Collection place: CA-Las-10, Buckhorn Canyon, Lassen County Collection date: 1940