Full Idea
The way in which Russell arrived at his analysis was by asking himself what would be the circumstances in which we would say that anyone who uttered the sentence 'The King of France is wise' had made a true assertion.
Gist of Idea
Russell asks when 'The King of France is wise' would be a true assertion
Source
Peter F. Strawson (On Referring [1950], §1)
Book Reference
'The Theory of Meaning', ed/tr. Parkinson,G.H.R. [OUP 1978], p.65
A Reaction
This seems to connect Russell's theory of definite descriptions with the truth conditions theory of meaning which is associated (initially) with Frege. Truth will require some reference to what actually exists.