Here are a couple of original photos I picked up:
Herb Pennock from 1923 (Underwood and Underwood)
herbpennock(1923)003.jpg
Herb Pennock and Yankees owner Jacob Ruppert from 1927 (Wide World)
herbpennock(1927)004.jpg
And here is what I believe is a George Burke/Brace negative of Bill Lee (1934). I was able to pick it up cheaply ($10), because I was able to recognize what it was from what I've learned from Lance about Burke/Brace negs. Thanks Lance.
billlee1934(1200)30.jpg