Robert Porter was the third son of Henry Porter (died c. 1619) and Anne, daughter of William Colmore, of
New Hall, Birmingham. At the start of the Civil War started Porter owned a water mill called Town Mill in Digbeth Street, Birmingham. It was located on a stream below Malt, or Moat, Mill which was fed by waters from the moat of the manor house of Birmingham and then flowed into the
River Rea. Porter had converted Town Mill from a corn mill into a blade mill, and being, like his brother-in-law, Waldive Willington (Governor of Tamworth Castle), a keen supporter of the Parliamentary cause would only supply swords to the Parliamentary side. In 1642, before the
Battle of Edgehill the first pitched battle of the Civil War, Birmingham supplied the Parliamentary army of
Robert Devereux, Earl of Essex with about 15,000 sword blades, many of which probably came from Porter's blade mill, because when
Prince Rupert briefly held Birmingham after the
Battle of Camp Hill (3 April 1643), Porter's Mill was singled out and burnt down by local Royalists ("malignants" as they were described by supporters of Parliament) to prevent it supplying further blades to the Parliamentary armies. Porter not only made blades, but knew how to use them. He was a captain in the Parliamentary cavalry during the Battle of Camp Hill, and is reputed to be the author of a letter published in a propaganda pamphlet by the Parliamentary side (see ''
A True Relation of Prince Rvpert's Barbarous Cruelly against the Towne of Brumingham''). Later in the Civil War he was treasurer of the Parliamentary garrison of
Edgbaston Hall under the command of
"Tinker" Fox. Porter was a trustee of Field's Charity and the Lench's Trust in Birmingham. He died in 1648. ==Family==