These three are from "Mirrors of Moscow" by H.J. Greenwall, published in 1929.
And here we have plates from "From Baltic to Black Sea" by Archibald Forman, published in 1932.
If we take Illya as being the same age as David, these pictures are a bit early... but still fascinating. If anybody is inspired to write an "Illya's childhood" fic, please feel free to use them as references!