Which historical figure wrote letters to Tacitus about the eruption of Vesuvius and was a suffect-consul in 100?

Pliny the Younger is the historical figure who wrote letters to Tacitus regarding the eruption of Vesuvius, which occurred in 79 CE. His letters provide a detailed and eyewitness account of the disaster, particularly concerning the fate of his uncle, Pliny the Elder, who died while attempting to rescue people from the eruption. Pliny the Younger's correspondence offers valuable insights into the events of the eruption, the natural phenomena observed, and the societal impact of the catastrophe.

Additionally, Pliny the Younger served as a suffect-consul in the year 100 CE, highlighting his prominence in Roman political life during that period. His writings are critical historical sources that contribute significantly to our understanding of the eruption of Vesuvius and its aftermath.