OK - found this in the book I have on my kindle - Celtic Mythology and the Religion of the Ancient Celts this answer part of my own questioning about the Druids - did not know they were part and parcel of the Celtic culture... here are some quotes...
"Julius Caesar's Notebooks About the Gallic War, written some time in the 50s or 40s BC. He discusses Celtic society and the Druids at length: “Throughout Gaul there are two classes of persons of definite account and dignity…Of the two classes above mentioned one consists of Druids, the other of knights. The former are concerned with divine worship, the due performance of sacrifices, public and private, and the interpretation of ritual questions: a great number of young men gather about them for the sake of instruction and hold them in great honour.
A great many young men come to the Druids for instruction, holding them in great respect. Indeed, the Druids are the judges on all controversies public and private. If any crime has been committed, if any murder done, if there are any questions concerning inheritance, or any controversy concerning boundaries, the Druids decide the case and determine punishments. If anyone ignores their decision, that person is banned from all sacrifices—an extremely harsh punishment among the Gauls. Those who are so condemned are considered detestable criminals. Everyone shuns them and will not speak with them, fearing some harm from contact with them, and they receive no justice nor honor for any worthy deed.
Among all the Druids there is one who is the supreme leader, holding highest authority over the rest. When the chief Druid dies, whoever is the most worthy succeeds him. If there are several of equal standing, a vote of all the Druids follows, though the leadership is sometimes contested even by armed force.
At a certain time of the year, all the Druids gather together at a consecrated spot in the territory of the Carnutes, whose land is held to be the center of all Gaul. Everyone gathers therefrom the whole land to present disputes and they obey the judgments and decrees of the Druids. It is said that the Druidic movement began in Britain and was then carried across to Gaul. Even today, those who wish to study their teachings most diligently usually travel to Britain.
The Druids are exempt from serving in combat and from paying war taxes, unlike all other Gauls. Tempted by such advantages, many young people willingly commit themselves to Druidic studies while others are sent by their parents.
It is said that in the schools of the Druids they learn a great number of verses, so many in fact that some students spend twenty years in training. It is not permitted to write down any of these sacred teachings, though other public and private transactions are often recorded in Greek letters. I believe they practice this oral tradition for two reasons: first, so that the common crowd does not gain access to their secrets and second, to improve the faculty of memory. Truly, writing does often weaken one's diligence in learning and reduces the ability to memorize.
The cardinal teaching of the Druids is that the soul does not perish, but after death passes from one body to another. Because of this teaching that death is only a transition, they are able to encourage fearlessness in battle. They have a great many other teachings as well which they hand down to the young concerning such things as the motion of the stars, the size of the cosmos and the earth, the order of the natural world, and the power of the immortal gods."