[GOPcapitalist]

He never wore one. Lincoln habitually wore a shawl.

That he did, and to this day Lincoln's shawl is in public view along with a collection of other Lincoln artifacts in the Lincoln museum at Ford's Theatre. It is an extremely effeminate shawl at that and has volumous and lengthy frills extending from its edges at least 4 inches. It is a beige color and would not be out of place decorating an old lady's couch or wrapped around her head in the coldest days of winter...just as Lincoln did on his way to the inauguration!

[4CJ]

"The shepard plaid shawl which Mr. Lincoln wore during the milder weather, and which was rendered somewhat memorable as forming part of his famous disguise, together with the Scotch cap, when he wended his way secretly to the Capital to be inaugurated as President, was given to Dr. Abbot, of Canada, who had been one of his warmest friends.
Elizabeth Keckley, Behind the Scenes or Thirty years a slave, and four years in the White House, New York: G. W. Carleton & Co. (1868), p. 309.

Mr. Lincoln and Colonel Lamon got on board the car without discovery or mishap. Besides themselves, there was no one in or about the car but Mr. Lewis, General Superintendent of the Pennsylvania Central Railroad, and Mr. Franciscus, superintendent of the division over which they were about to pass. As Mr. Lincoln's dress on this occasion has been much discussed, it may be as well to state that he wore a soft, light felt hat, drawn down over his face when it seemed necessary or convenient, and a shawl thrown over his shoulders, and pulled up to assist in disguising his features when passing to and from the carriage.
Ward H. Lamon, The life of Abraham Lincoln; from his birth to his inauguration as president, Boston: James R. Osgood & Co (1872), p. 523.