Analysis of information sources in references of the Wikipedia article "Circumnavigation" in English language version.
Although Robert's record attempt finished in 2003, it has taken 5 years to collate and confirm the record evidence [...] We are very cautious to accept records like this because they are difficult to certify, however Robert has provided us with full evidence which enabled us to authenticate his amazing achievement. We initially evaluated 15 boxes full of credit card statements, receipts in Robert's name and other useful evidence, which supported Robert's presence in all of the 29 countries within the time specified. We then moved on to establish whether Robert had actually been running and started to look through an astronomical number of pictures and newspaper cuttings from different parts of Robert's route. We also reviewed over 300 time-coded tapes featuring Robert running at different locations during his journey. We could finally double check the route followed through statements from several witnesses, and passports stamps and visas...