According to "Shipwrecks of the Pacific Coast" by James A. Gibbs, Jr. (pages 218-220):
"On the night of July 20, 1907, the passenger liner Columbia was bound for Puget Sound from San Francisco. Off Shelter Cove, south of Mendocino Cape, a ship's whistle was heard off the starboard bow. The night was black and filtered with patches of fog. . .Suddenly the running lights of the nearby ship came into view. . .[which] plunged squarely into the side of the Columbia. . .[they had been] rammed by the steam schooner San Pedro, fully laden with lumber. The collision was no brush, but a motral wound, a gash 30 feet abaft for the Columbia's stem on the starboard side. . .The Columbia was carrying 249 passengers. So quickly did the sinking occur that many of the ship's company were carried down the ship without ever stepping foot on deck. . .As the disabled San Pedro floundered about, some 70 survivors of the liner were taken aboard. . .as she [San Pedro] drifted away from the scene of the wreck, the SS George W. Elder, answering the call of distress, searched the scene and picked up 88 survivors..."
There is quite a bit more information in the San Francisco newspapers, along with a few pictures of passengers, both who survived and didn't. Though, I didn't see one for Mrs. Soules.
There were lists of those saved and those who were lost. This is a list of those who weren't saved:
CABIN PASSENGERS: Mrs. R. Anderson, Franklin Aulf, W.J. Bachman, Alma Bahleen, Mrs. J. Benson, Miss A. Bernal, Mrs. Jane E. Best, Gertrude Butler, W.E. Butler, Mrs. W.E. Butler, Mrs. R.B. Cannon, Miss Clara Carpenter, J.W. Carpenter, L. Clasby, Mrs. L. Clasby, Marion Clasby, Steven Clasby, Miss Lena Cooper, Miss A.B. Cornell, Mrs. A.F. Cornell, L.L. Drake Jr., J.C. Durham, Mrs. K. Fagalde, Miss Mabel Gerter, Mrs. Blanche R. Gordon, Mrs. A. Gray, Mrs. A. Happ, C.H. Harrington, Miss K. Hayden, L.E. Hill, E.B. Keever, Miss Alma B. Kellar, Miss Effie B. Kellar, Miss Grace F. Kellar, Mrs. G.A. Kellar, Florence Lewis, Mrs. O.S. Lewis, Ray Lewis, E. Liggett, Mrs. B. Lippman, Lewis Malkus, Mrs. Lewis Malkus, Julia Matek, L. Mero, John B. McFadyen, Miss Margaret McKeaney, Chew Moch, Miss Louise G. Nake, Miss Nellie A. Nake, Miss Mary Parsons, J.E. Paul, Miss Frances Schroeder, Miss Cora Schull, G.A. Smith, MRS. WILLIAM SOULES, George Sparks, J.D. Springer, Miss Elsie May Stone, Miss A.S. Todd, W.C. Todd, Miss B. Wallace, Miss Edna Wallace, Mrs. S. Waller, William Waller, Miss W. White, G.F. Wilson, C.A. Winslow, Mrs. C.A. Winslow, Mrs. H.P. Winters, Roland Winters, Miss H. Wright, J.K. Young.
STEERAGE PASSENGERS: Frank Giune, M. Mayo, C.W. Merrill, John Miller, J. Premus, E. Silva, Mrs. E. Silva, A. Spieler, B. Viants.
CREW: P.A. Doran, Captain; W.F. Whitney, First Officer; C. Christensen, P. Hinner, Quartermasters; H.C. Dupree, First Assistant; Max Claus, Second Assistant Engineer; C. Petersen, Seaman; W.T. Anderson, --- Alexander, Water Tenders; Ed Larkin, J. Maddison, Oilers; A. Schneider, Baker; Frank D. Davis, Second Cook; E.R. Drayer, Pantryman; J.G. Alley, R.J. Alley, Al L. BLocker, Waiters.
Source--San Francisco Call, July 23, 1907, page 2.
Here's the actual image from the newspaper:
http://xs10.xs.to/pics/05014/missing.jpg