Source

"Contrast the condition into which all these friendly Indians are suddenly plunged now, with their condition only two years previous: martial law now in force on all their reservations; themselves in danger of starvation, and constantly exposed to the influence of emissaries from their friends and relations, urging them to join in fighting this treacherous government that had kept faith with nobody--neither with friend nor with foe" (Jackson 178).

Example Four: Writer B has borrowed an unacknowledged phrase from Jackson without indicating changes he/she has made, including the omission of material and changes in grammar and word choice.