at what point of time did Gandhi arrive in Champaran?

Most of the arable land in the Champaran district was divided into large estates owned by Englishmen and worked by Indian tenants. The chief commercial crop was indigo and the landlords compelled all tenants to plant three twentieths or 15 percent of their holdings with indigo and surrender the entire indigo harvest as rent. This was done through a long-term contract. Presently, the landlords after learning that Germany had developed synthetic indigo, they obtained agreements from the sharecroppers to pay them compensation for being released from the 15 percent agreement. The peasants willingly signed on as the sharecropping arrangement was irksome to them. Those who resisted engaged lawyers and the landlords hired thugs in retaliation. The illiterate peasants who had signed and wanted their money back learned about the development of synthetic indigo. It was at this point that Gandhi arrived in Champaran.