library of congress. photoduplication service · 1990
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![[Joseph Pennell, examining proof print, at Peters' studio, Philadelphia]](https://tile.loc.gov/storage-services/service/pnp/cph/3b30000/3b37000/3b37100/3b37134_150px.jpg#h=150&w=111/full/!400,400/0/default.jpg)