Investing Rodrigo - Costello - Page 79 -

"Now was the time to cure a skulker, or teach a man to work for his 'life'. There we were, in twos, each provided with a pick-axe and shovel; now digging with a vengeance into the frozen mould, and then watching the glances of the shot and shell; and again sticking to work like devils, or perhaps pitching ourselves on our bellies to avoid their being 'purged' with grape or canister."

Page 79 - Costello again

"The following day we were relieved by the 3rd division, and marched back to our quarters, cold, hungry, and fatigued enough. One great annoyance we experienced at this time, was having to cross the Agueda in going to and returning from the trenches. Pieces of ice that were constantly carried down this rapid stream bruised our men so much, that, to obviate it, the cavalry at length were ordered to form four deep across the ford, under the lee of whom we crossed comparatively unharmed, although by the time we reached our quarters, our clothes were frozen into a mass of ice.
Our divisions continued relieving each other in the trenches for some days, until two breaches were considered practicable for an assault."