Known sourcecanonical
"Napoleon's troops fought in bright fields, where every helmet caught some gleams of glory; but the British soldier conquered under the cool shade of aristocracy. No honours awaited his daring, no despatch gave his name to the applauses of his countrymen; his life of danger and hardship was uncheered by hope, his death unnoticed."
Sir W. F. P. Napier / Peninsular War (1810). Vol. ii. Book xi. Chap. iii.
Peninsular War (1810). Vol. ii. Book xi. Chap. iii.
Bartlett's Familiar Quotations, 9th ed. (Little, Brown, 1905), public domain