I Googled "Vintage Yardley Cosmetic Ads" and there are many, but your dream girl is not there. Could she be a "Dream Girl Dream Girl Beautiful Luster Cream Girl" shampoo ad, No of course not, but it is strange how we recall ads for many many years. John, you have presented an interesting challenge, we need more to keep the UHH blood flowing.
Well, there were a few ladies in your link that might have been the "head model" for that terrible sketch, but I couldn't find ANY photos of the second use.
I'm still waiting for someone to take up the challenge.