Sallust was a historian from ancient Rome. He knew Julius Cæsar. Few historians can claim the same.
For more on him and his contributions, the Introduction by J. C. Rolfe is the best source of information and you will find it here, along with the Letters and Orations he has preserved from other leading lights of his period, in both English and Latin.
The Latin text differs significantly, at times, from other online texts and and so it has been included as well. The text of 5 of these Letters has been compared with the one online at the Latin Library. In the source code for the page you can find the places where the differences between the two occur.
This first-hand glimpse of the most famous period in Roman history is an interesting one, so click on Next below, Citizens, and discover that world.