I am not sure I understand your question. Pliny the Younger wrote about the 79CE eruption and the death of his uncle in his Letters.
It is also worth noting as a secondary correlation, his uncle Pliny the Elder, was killed during a rescue operation trying to save folk made homeless by that eruption. And we find that after 79CE there are no more new works from Pliny the Elder. Also a new Prefect of the Roman Fleet is appointed by Vespasian.
The point is that there is corroborating evidence of the 79CE eruption of Vesuvius. There are eye witness accounts. There are ruins that contain coins where none date later than 79CE, where all of the architecture, pottery, construction, clothing, paintings and ornaments are all of the style found before 100 CE. There are the distinct layers of ash. There are the radiometric measurements.
Each data point independently corroborates a major eruption of Vesuvius in 79CE.
The issue is simply not in doubt or question.
Aslan is not a
Tame Lion