Inaba inquired this matter of the lord of the Marugame domain Takatoyo KYOGOKU by sending a letter to him, and he got a response from him that said, "I have known the person called Hyobu ROKKAKU."
稲葉はこの件について、丸亀藩主京極高豊に書状を送って照会し、「六角兵部という者なら知っている」との回答を得ている。