Peter Palmquist used the following heading for filing the images where the photographer was not known. Some parts of the filing system were alphabetical, some were not.

Arcata
Blue lake
Eureka
Ferndale
Fort Seward
Hydesville
McKinleyville
Rohnerville
Trinidad
Shipping
Portraits – Humboldt County
Animal Logging
Camps
Mills
Misc.
Trains
Agriculture
Business and Occupations
Photographers
Groups
Indians
Children – Portraits
Ladies – Wedding dress
Ladies – Portraits
Men
Men – Portraits
Tin Types
With Animals
With Music
Bridges
Camping
Fishing
Hunting

Towns
Alderpoint
Alton
Bayside
Bear River
Blocksburg
Briceland
Cresent City
Dyerville
Essex
Fields Landing
Fortuna
Garberville
Harris
Hoopa
Korbel
Miranda
Orick
Orleans Bar
Pepperwood
Petrolia
Requa
Scotia
Willow Creek

Transport
Airplane
Ferries
Horse

Logging
Bucking
Forest land
Steam donkeys
Undercuts
Wood cutting

Occupations
Quarrying
Mining
Couples – Wedding

People
Babies
Couples
Ladies in Fancy Dress
Case art
Spirit photography
With bicycle

Places
Floods
Lagoons
Lighthouses

Misc.
Rivers
Schools
Events
Recreation
Scenes
Picnics