What is the value of a first edition copy of The Adventures of Tom Sawyer 1876 publisher Saalfield Company?
I don't believe the Saalfield company was started until 1900, and I believe the original publisher was American Publishing Company. Although, I believe it was published first in Brittan by Chatto and Windus due to due to copyright difficulties. However, it is possible my research is wrong, so verify for yourself as well.
The publisher was Harding, Mavor & Jones and the year was 1818. This version was titled Frankenstein; or, The Modern Prometheus. It was issued as "anonymous". A second edition was credited to Shelley in 1823. Then in 1831 under Henry Colburn & Richard Bentley a heavily revised edition(done by Shelley) was published. This edition is the most widely read version today.