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"Ezio smiled at the memory of his friend. Leonardo, whose mind was ever teeming with new ideas, though it always took him a while to get round to them. Hthought ruefelly of the hidden blade, which had been shattered in the fight wgeb they’d ambushed him. Leonardo - homw he missed him! - the one man he could have teally trusted to mend it."
Assassin’s Creed: Revelations, by Oliver Bowden, Chapter 2, page 14.