They apparently loved to fight and plunder.
Might be so, although it was Shawnees who were prominent in the Southwestern scalps-for-bounty trade in the 1840's.
Just as often, if you'll overlook the 3,000 White settlers killed by Indians in Pennsylvania in the French and Indian War, individual Delawares turn up in Frontier accounts as friendly and multilingual.
Heckewelder of course, who lived with them in times of peace, mentions a bunch, and F&I era capive Highlander Robert Kirk ran into one at Fort Duquense shortly after his capture
(ANOTHER remarkable book see...
http://www.amazon.com/Through-So-Many-Dangers-Adventures/dp/193009860X )
Here in Texas the most famous Delaware was Jim Shaw.
http://www.tshaonline.org/handbook/online/articles/fsh11 Jim Shaw, a Delaware Indian, was noted as a valuable frontier scout, interpreter, and diplomat during the period of the Republic of Texas and in antebellum Texas....
He appeared on the frontier of the Red River as early as 1841, when he was in his twenties or early thirties. At that time he reportedly saw the botched Texan Santa Fe expedition as the party turned west at the Wichita River, which they mistook for the Red River.
Shaw later claimed that if he had not been leery of the Texans on account of President Mirabeau B. Lamar's harsh Indian policy, he would have offered his services and guided them to Santa Fe, thus perhaps changing the course of history. At any rate, Shaw was obviously familiar with the vast plains and breaks of West Texas Birdwatcher
