| Description | English: Portrait of Frederick J. Osterling published in 1913 |
| Date | 1913 |
| Source | The Book of Prominent Pennsylvanians (https://archive.org/details/bookofprominentp00pitt/page/206/) |
| Author | Anonymous |
Frederick Osterling
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Tag Archives: Architects
Benno Janssen
| Description | English: Benno Janssen from a book published in 1923 |
| Date | 1923 |
| Source | Western Pennsylvanians (https://archive.org/details/westernpennsylva00char/page/196) |
| Author | Anonymous |
Henry Hornbostel, by W. S. Washburn
| Description | English: Caricature of Henry Hornbostel by Pittsburgh cartoonist W. S. Washburn |
| Date | 1914 |
| Source | Sketches, Serious and Otherwise: Men of Pittsburgh and Vicinity (https://books.google.com/books?id=uScwAAAAYAAJ&pg=PP73#v=onepage&q&f=false) |
| Author | W. S. Washburn |
Henry Hornbostel
From Sketches, Serious and Otherwise: Men of Pittsburgh and Vicinity, by W. S. Washburn.