This involved the killing of Spencer"s Family
From History Link.org
Native Americans attack Americans at the Cascades of the Columbia on March 26, 1856.
Spencer's family was killed right after the Cascade Massacre at the Cascades.
a footnote from the book "History of Oregon", by Charles Henry Carey. Page 613 Google Books
FROM THE BOOK "INDIANS OF THE NORTHWEST: A HISTORY" BY ROBERT H. RUBY, JOHN ARTHUR BROWN.
CHIEF SPENCER'S GREAT GREAT GRANDDAUGHTER MARLENE SPENCER SILMA