Electrostatics and its origin

Electrostatics is the branch which deals with forces between the charges which are stationary and about the fields produced by the charges
In 600 B.C., the Greek scholar Thales discovered that when amber is rubbed with fur it attracts small pieces of straw, cork and paper.
Generalisation of this concept is deduced by Dr. William Gilbert stated that many other materials also exhibit the same behaviour as amber.As amber means 'electron', he named this effect as 'electric'
Substances made of atoms. Atom consists of the origin around which electrons move in orbits. Infact, in an atom electrons(negative charge) and protons(positive charge) are equal in number, so that atom is neutrally charged.
But when a glass rod is rubbed with a silk cloth, electrons from glass rod move on to the silk cloth. This transfer of electrons makes glass rod positive (as it looses electrons) and silk cloth negative(as it gets excessive electrons)
Even transfer of electrons from one substance to another substance does not violate the law of conservation of charge because the number of electrons lost by a body is exactly equal to the number of electrons gained by the second body and no new charge is created or destroyed.
The magnitude of the charge on electron is denoted by 'e' and its value is 1.6*10^-19C.
Nobody found that charge is fractional value, therefore charge e=ne(positive or negative), where n is an integer. The quantisation of charge is firstly experimentally proved by R.A.Millikan in his famous Oildrop Experiment.