Spiller’s father migrated from Cornwall to Shaftesbury, where he was elected mayor in 1569.
The accusations began in July 1606, when Thomas Felton, a former commissioner for recusant lands, accused Spiller of using his office to protect recusants and defraud the Crown.
In 1612 Spiller received a Crown grant of the Middlesex manors of Billets, which he already held on lease, and Laleham.
urged Mr. Spiller to give the House an account that since the king had so great a benefit by recusants to know what became of it, telling him that he wondered how [as] a poor clerk he came to dispend £3,000 per annum. His answer was somewhat impertinent, but in conclusion he alleged that the king gave it away.
Procs. 1614 (Commons), 185-6.
However, as Chamberlain remarked, Spiller was not the only man whom the Commons had in its sights, and no further attempt on him is recorded in the Addled Parliament.
Early in 1615 Winwood, assisted by the duke of Lennox, again attempted to have Spiller removed, but though brought before the Privy Council Spiller again cleared himself.
Re-elected for Arundel to the third Jacobean Parliament, Spiller was named to eight committees and made nine speeches. He was among those appointed to consider abuses in the Fleet prison (14 Feb. 1621).
During the summer recess Spiller took part in the seizure of the papers of Sir Edwin Sandys*, but an attempt to call him to account for this when the House met again came to nothing.
In the summer of 1623 Spiller was involved with various government ministers in discussions over the concessions to be made to Catholics under the proposed Spanish marriage treaty.
Spiller was re-elected to the first Caroline Parliament, in which his only committee appointment was to consider a bill for Exchequer assignments (23 June).
At the next general election in 1628 the earl of Arundel provided him with a safe seat at Thetford but he also contested and won a county seat in Middlesex.
Spiller continued to prosper in the 1630s, and to use his influence on behalf of Catholics, albeit within the limits of the law. In 1634 he told a Worcestershire neighbour that non-residents had been presented for recusancy in Middlesex, and may have prompted the inquiry into pursuivants.
