1. Rarity: The 1847 edition may have limited copies available, making it relatively scarce. Rarer editions tend to have higher value.
2. Condition: The overall condition of the dictionary matters. Well-preserved copies with little damage, no missing pages, and intact bindings are more valuable than worn-out or damaged editions.
3. Publisher and Author: The publisher and author associated with the dictionary can influence its worth. Notable authors or renowned dictionaries from specific publishing houses may increase the value.
4. Historical Significance: If the dictionary has any particular historical significance or association with important events, this can add to its value.
5. Binding and Illustrations: Dictionaries from the 19th century often featured distinctive bindings and illustrations. If your dictionary has elaborate bindings or unique illustrations, it might enhance its value.
Considering all these factors, an 1847 dictionary in excellent condition, from a notable publisher or author, with historical significance, and unique features could potentially be worth several hundred to a few thousand dollars.
However, it's important to have the dictionary evaluated by a professional appraiser or an expert in rare books and collectibles for an accurate valuation.