Robert Blashel Thompson (Joseph Smith's secretary), was an associate editor of the Times and Seasons in Nauvoo. From May to August 1841 he worked there with Don Carlos Smith. On 16 August 1841, at the age of 29, he was seized with the same disease that had stricken Don Carlos Smith, and died 9 days later. William Law later said he died under 'suspicious circumstances:' "I know that several men, six or seven, died under very suspicious circumstances. Among them were two secretaries of the prophet, Mulholland and Blaskel Thompson. I saw Mulholland die and the symptoms looked very suspicious to me. Dr. Foster, who was a very good physician, believed firmly that those six or seven men had been poisoned, and told me so repeatedly."
[Broadhurst, Dale R., Mormon Chronology, http://olivercowdery.com/history/morchrn2.htm]