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Hartwig, D. Scott. A Killer Angels Companion. Gettysburg, Pennsylvania: Thomas Publications, 1996.
Longstreet, James. From Manassas to Appomattox : Memoirs of the Civil War in America. Philadelphia: J.B. Lippincott Co., 1896.
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Possible on doing something is better than nothing. Because the Calvary scout did not do his job the rest of the confederate side was blind to the upcoming battle. Also the general whom was ordered to attack the union on top of the hill failed to do so which also contributed to the failure of the confederates in this battle.
other Note: chamberlain is very tactically well rounded and was smart enough to win the battle defensively, general lee's over aggressiveness ended up being his downfall.