In obedience to his original orders

From The Great Mutiny by Christopher Hibbert. Page 137.

Sorely afflicted by an attack of gout, and bitterly cursed by his soldiers' wives - who ran down to the river's edge to welcome the steamer back only to see it run past its moorings to the hospital - General Lloyd made no further efforts to help the garrison at Arrah. But a more enterprising officer decided to assume personal responsibility for the relief. This was Major Vincent Eyre, an elderly artillery officer who had consistently refused offers of employment in the Civil Service, preferring to stay with his regiment, though failing to receive the promotion which his character and talents deserved. Eyre was on his way from Calcutta to Allahabad with his battery when he heard at Buxar of the plight of the garrison at Arrah. Persuading Captain L'Estrange, who was at Buxar with a detachment of one hundred and sixty men of the 5th Fusiliers, to join him, he immediately marched to Arrah on his own responsibility.

Defeating the mutineers at Gujraganj, where they had hoped to check his advance, he sent them flying from Arrah, relieved the grateful garrison, pursued the rebels towards Jagdishpur, and, proclaiming martial law, hanged thirty wounded prisoners as well as various native officials who had entered Kunwar Singh's service. Reinforced, he attached Kunwar Singh's stronghold at Jagdishpur; captured it; blew up all the main buildings in the village; and, while the old Rajput escaped to fight again, distributed the vast stores of grain that had been collected for the rebel army to the peasants from whom it had been exacted. Eyre, having thus quelled the insurrection in western Bihar, took his battery off to Allahabad in obedience to his original orders.