A Texas museum hopes a document found in its archives turns out to be an authentic government copy of Abraham Lincoln's eloquent letter consoling a mother thought to have lost five sons in the Civil War.

The famed Bixby Letter, which the Dallas Historical Society is getting appraised as it prays for a potential windfall, has a fascinating history.

The original has never been found. Historians debate whether Lincoln wrote it. Its recipient, Lydia Bixby, was no fan of the president. And not all her sons died in the war.

The letter, written with "the best of intentions" 144 years ago next week, is "considered one of the finest pieces of American presidential prose," said Alan Olson, curator for the Dallas group. "It's still a great piece of writing, regardless of the truth in the back story."

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