Ensign Gambier thinking, I conclude, that further persuasion was useless, left also

From The Great Mutiny by Christopher Hibbert. Page 112.

After the order to retreat from the tower had been given, in the hope that some at least of his men might even now be 'brought back to a proper sense of their duty', Peile returned to the cantonments where, as he recounted, he found several officers assembled

with no fixed attention as to their future movements ... By degrees nearly all these left, leaving Lieutenant-Colonel Knyvett, Ensign Gambier and myself alone. Thinking it useless to remain longer, as our lives were evidently in danger, but still wishing if possible to save our colours, I consulted with Ensign Gambier, who consented to accompany me on horseback taking them with us. I obtained the consent of Colonel Knyvett to their removal, but on demanding them from the sentry over them, he refused to deliver them up unless the Colonel himself verbally gave the order. On turning round however to ask the Colonel to do so, to my astonishment I found he had quitted the guard-house and I never saw him after. Ensign Gambier thinking, I conclude, that further persuasion was useless, left also, and I have since heard joined the Colonel somewhere outside.