[1] Soon after in early October, Leiden was besieged but a chance of a quick victory disappeared when the Spanish realised the city had stronger defences and a well stocked garrison.

[2] Alba then sent the master of his camp Francisco de Valdez with his veteran Tercio soldiers along with twelve companies of Walloons; in all numbering 4,000 men under the command of Julián Romero to advance deep into Holland.

[9] Meanwhile, Thomas Morgan's regiment of English, several Scots, a few French Huguenot companies besides the States troops under the command of the Prince of Orange were lodged in the villages between Delft and Rotterdam safely from the Spanish.

[13] Valdez constructed a few peat boats which were manned with nearly a thousand hand-picked troops with the intention of gaining the city at night from different directions.

[3] Meanwhile, at the Poldervaart Sconce outside Delft, Captain Chester with his company of 200 English men-at-arms highly distinguished themselves in repelling the attack, inflicting heavy casualties.

[6] After these attempts, Valdez informed the Duke of Alba of his defeat, showing him that victory could not be achieved without a larger force along with siege artillery.

[5] For his action in helping to repel the Spanish attack on the city, the Prince of Orange promoted Chester to the rank of lieutenant colonel.