Full Idea
I shall distinguish a proposition expressed in words as a 'word-proposition', and one consisting of images as an 'image-proposition'.
Gist of Idea
A proposition expressed in words is a 'word-proposition', and one of images an 'image-proposition'
Source
Bertrand Russell (On Propositions: What they are, and Meaning [1919], §III)
Book Reference
Russell,Bertrand: 'Logic and Knowledge', ed/tr. Marsh,Robert Charles [Routledge 1956], p.308
A Reaction
This, I think, is good, though it raises the question of what exactly an 'image' is when it is non-visual, as when a dog believes its owner called. This distinction prevents us from regarding all knowledge and ontology as verbal in form.