Going into the game on the back of a hammering at Barnet on Saturday, Cobblers fans will have feared the worst when promotion-chasing Rotherham took a two-goal lead within 19 minutes at the Don Valley Stadium.
However Ian Sampson will have been delighted with the spirit shown by his side as first Osman and then Holt netted within a minute to level the game.
With Barnet and Hereford having been defeated on Tuesday night, Northampton edge a point further away from the League Two relegation zone.
Reaction to follow on Cobblers Mad.