I'll say all Quote Investigator articles are of high-quality by the fact they do an extensive literature research citing all their found sources in the process.

I'll say all Quote Investigator articles are of high-quality by the fact they do an extensive literature research citing all their found sources in the process. This alone puts it above most web articles I read. Moreover the general theme of the site, that is tracing quotations, on its own makes it stand out as not only it isn't a simple task but also a quirky and interesting subject. Finally this specific quote and the found texts are probably relevant to many in this forum and that's why all comments are around this.