Review the evidence:
- The author is listed and has an academic affiliation
- The article was updated recently. Even though articles about historical people and events have a longer 'life' than information about current events, new information can influence modern interpretation of the past.
- The links work, which means the site is maintained and managed.
- The purpose of the article is to inform researchers about Mary Musgrove and Georgia history.
- Bias is very limited; the author took care to provide information from multiple perspectives.
Conclusion: If a researcher needs good background information about Mary Musgrove and early 18th century Georgia history, this is a high-quality site.