I am afraid I wasn't specific enough. What are things that others have offered as facts that you believe are fictions?
Here is one example: the period that Takeda Sokaku spent in Ayabe between April and September, 1922. One version has it that Ueshiba invited Takeda to Ayabe and did so because the skills he had so far acquired did not equip him to cope adequately with the naval officers from Maizuru. The other version has it that Takeda told Ueshiba that he did not need any more training and spent his time there not getting on very well with Onisaburo Deguchi, who also returned the dislike. You can document both versions with seemingly unimpeachable 'internal' sources ('internal' meaning internal to Daito-ryu or aikido).
All good wishes for 2010