How did the research on Duquesne begin?

Where did you find information about Abraham Duquesne?

The research began with Encyclopaedia Britannica and cited sources, including foreign-language material used cautiously through machine translation.

Alex Clarke began his research on Duquesne with Encyclopaedia Britannica, then followed the sources listed on Wikipedia and consulted other books. His objection to citing Wikipedia as an academic authority concerns the lack of a named author or editor who can be credited and held accountable. Its bibliographies nevertheless led him to foreign-language sources that he would otherwise have missed. His limited French required some reliance on Google Translate, so he qualified claims drawn from that material. Translating the same text repeatedly produced different results.