Jack Kerouac's original typescript scroll for On the Road the 37 metre (121ft) long roll of paper on which he typed his defining Beat novel in a three-week burst will go under the hammer at Christie's in March, with a sale estimate of 1.8m to 2.9m ($2.5m to $4m). The scroll is one of the centrepieces of the Jim Irsay Collection, one of the most extensive private collections of music, literary, film and sports memorabilia ever assembled.