In the latter case, the book of "IKENOUE Shiro Kazo Zakki (notes owned by Shiro IKENOUE)" (Shiro ICHIKI "Ishimuro Hiko (data Shiro ICHIKI collected)" included in the National Diet Library) wrote that Saigo Sensei was out hunting, which was a treatment for obesity, as was written in the letter for Shiro IKEGAMI from Chuhei SAKAKI.
後者については『池上四郎家蔵雑記』（市来四郎『石室秘稿』所収、国立国会図書館蔵）中の池上四郎宛彭城中平書簡にこの治療期間中に西郷先生が肥満の治療のために狩猟に出かけて留守だと書いている。