No, but information on Wikipedia tends to be accurate and based on reliable sources -- when a person contradicts Wikipedia and fails to provide any sources of their own, they are usually wrong. Not necessarily, of course, but often enough to say the burden of proof lies with the person making the unsubstantiated claim.
The 1911 Britannica is not the source provided. The source is a hypothetical entry in an encyclopedia that most people don't have. That is not as valuable a source as Wikipedia because I cannot easily verify that the 1911 Britannica corroborates the facts in this email.