But it seems I need to change my mind ... a little, at least. Early this year this book about Cornwell was published. It contains large details of some Cornwell illustrations that indicate he didn't change his style as completely as I had assumed. Chalk some of that up to the fact Internet images tend to be fairly small, and a large painting reduced to 600 by 800 pixels, say, loses a good deal of detail.
Below are some images of Cornwell's work to illustrate my point regarding style continuity. All can be enlarged by clicking on them, and a few are very large. I note the latter in the captions.
An example of Cornwell's 1920s style. Brushwork is bold and visible aside from certain details that are smoothly rendered.
The face of the girl in the red cloche hat is smoothly painted, but most of the rest features Cornwell's usual style. Click on the image for significant enlargement.
Following fashion, Cornwell used a more "hard edge" approach in this illustration. The woman's face, hands, leg, scarf and dress lack the painterly touch. Ditto the brim of the man's hat.
I'm not sure about this illustration's date. The woman's hair style could be 1936-49 or perhaps earlier, and her dress is pre-1940. She and her accessories are not rendered in Cornwell's painterly style, though much of the rest of the illustration is.
I used this illustration in the earlier post where I showed how Cornwell's style had changed to suit the times. However, as in the previous two images, we see that his adjusted style is mostly for the main subjects. Backgrounds and other details bear evidence of his earlier technique. Click on the image for significant enlargement.
Another illustration from the series. The cavorting Romans in the foreground as well as much of the setting recall his earlier work.
Another example where parts of the illustration followed Cornwell's earlier practice. Click on the image for significant enlargement.
This was done for a Colombian fruit promotion. I'm not at all sure of its date. This is a case where very little of the classical Cornwell style can be found. Click on the image for significant enlargement.