Their's

Colonel Middleton was dismounted amongst the king's forces, of whom one, taking him for a commander of their's, mounted him again, and bid him make haste, and kill a roundhead; and so he escaped.

Source: wiktionary

“Forward, the Light Brigade!” / Was there a man dismay’d? / Not tho’ the soldier knew / Some one had blunder’d: / Their’s not to make reply, / Their’s not to reason why, / Their’s but to do and die, / Into the valley of Death / Rode the six hundred.

Source: wiktionary

Irish ladies have feet very pretty, / English ladies have their's very small; / French ladies' are dressish and natty, / Chinese ladies have no feet at all.

Source: wiktionary

But however many the families number, their’s is the republic, the power and the glory, and for ever and ever they mean to keep it.

Source: wiktionary