- Old Testament
- Old St. Paul's, from the East
- Old St. Paul's on Fire
- Old Parliament House, Dublin
- Old Norwegian ski. (Based on a drawing from the year 1644.)
- Old Monomoy Lighthouse
- Old Mans Head
- Old man wearing fez
- Old man sitting by the fire
- Old London Bridge
- Old lady with beard
- Old lady and some geese
- Old Lady
- Old Lady
- Old Independence Hall, Philadelphia
- Old Houses, White Hart Inn, Southwark
- Old French House, Quebec
- Old folding cap man
- Old Eprouvette Pendulum
- Old English double curtail
- Old Dice-box.
- Old Cloths
- Old Chinese Man Divider
- old
- Ojibwa Women Gathering Wild Rice
- Ojibwa Gravepost
- Ojeda's first voyage
- Oil lamp
- Oh Where, Oh Where Is my Little Dog Gone
- Oh Dear, not a county family?
- Often she would stand upon the walls of Troy
- Officers uniform
- Officers Undress 1891
- Officers Service Dress
- Officers Rank 1862
- Officers of the table
- Offerings to a god
- Offering food before the shrine of the Big Birds’ ceremony
- Off for a vacation
- Of the Water-Insect or Gnat
- Of the Seeds of Tyme
- Of the Seeds of Poppy
- Of the Eyes and Head of a Grey drone-Fly
- Of the Colours observable in Muscovy Glass, and other thin Bodies
- Of the Beard of a wilde Oat
- Of some Phænomena of Glass drops
- Of Peacocks, Ducks, and other Feathers of changeable colours
- Of Moss, and several other small-vegetative Substances
- Of Cowage, and the itching operation of some bodies
- Of course, they wore hideous false faces
- Of a Plant growing in the blighted or yellow specks of Damask-rose-leaves
- October
- Octave Chanute experimenting with his gliders on the Michigan sand dunes
- Océanie, Pêche aux Palmes
- Océanie, Pêche aux Palmes
- Occipital view of the same Skull
- Obstruction on the Bridge
- Observing the murderer's boots
- Observe this picture closely
- Oblique Chignon