He remained with his family for the rest of his life, living long enough to see the two sons Publius and Lucius marry, as well as the birth of his first grandchild.
Conflict between the Populares under Gaius Marius and the Optimates under Lucius Cornelius Sulla was escalating in the 80s BC.
The geographer Strabo refers to a treatise on the Cassiterides, the semi-legendary Tin Islands regarded as situated somewhere near the west coasts of Europe, written by a Publius Crassus[3] but not now extant.
Several scholars of the 19th and early 20th centuries, including Theodor Mommsen[4] and T. Rice Holmes, thought that this prose work resulted from an expedition during Publius's grandson's occupation of Armorica.
[5] Scholars of the 20th and early 21st centuries have been more inclined to assign authorship to the elder Publius, during his proconsulship in Spain in the 90s BC, in which case the grandson's Armorican mission may have been prompted in part by business interests and a desire to capitalize on the earlier survey of resources.