The disappearance of Salih ibn Wasif and the hunt for the commanders and secretaries

In 256 AH people woke to find that Salih ibn Wasif had gone into hiding. al-Tabari names the senior commanders and secretaries who were sought in that strife, and reports that al-Hasan ibn Makhlad was released from the prison of Salih's house. ¹

al-Mas'udi reports that Musa ibn Bugha feared that Salih would plot against them while he was in hiding, so he sent spies in search of him until they found him. Salih fought and resisted, and was then killed and his head was cut off. In another report, a bath was heated for him and he died in it. ²

The two reports come from different sources, and the authority cited here does not combine them into a single account. The chronological order needs an additional source.