Joseph wanted to send Hyrum away so his blood will be avenged if he were to be killed.
Miscellaneous Notes [21–23 June 1844], entry for 22 June 1844, 1, The Joseph Smith Papers website, accessed August 11, 2021
About Sun Down, General Smith ordered a council to be called consisting of H[yrum] Smith J. P. Green Gen Dunham, Col Markham W[illiam] W. Phelps W[illard] Richards, Bishop Whitny [Newel K. Whitney] John Taylor & others, When Gen Smith stated, that if ever we are taken again Hyrum & I will be massacred, I have sent Br [Sidney] Rigdon away, I want to send Hiram away also to save him to avenge my blood.