Holcroft was a year old when his father died and he became a ward of his future father-in-law, Edward Fitton.
Through his kinsman, Thomas Holcroft I†, a servant of the 1st Lord Burghley (Sir William Cecil†), Holcroft was admitted to Gray’s Inn in 1588. The following year his niece married Burghley’s grandson, William Cecil†, and in 1600 and again in 1604 Thomas Cecil†, 2nd Lord Burghley, recommended Holcroft to his brother, Robert† (later 1st earl of Salisbury).
Holcroft made at least 12 speeches during the session but the contents of five - on bills for the better execution of justice (20 Apr.), alehouses (5 June), free trade (6 June), a land exchange between Trinity College, Cambridge and Sir Thomas Monson* (7 June), and the increase in livings for parsons (28 June) - have gone unrecorded.
During the 1605-6 session Holcroft was again appointed to committees on river navigation (7 Feb.), alehouses (11 Feb.) and fen drainage (4 March). The other other public legislative committees to which he was named concerned the confirmation of leases (23 Jan.), the conveyance of lands (29 Jan.), the subsidy (10 Feb.), the Marshalsea Court (13 Mar.), butter and cheese (4 Apr.), the false making of black soap (5 Apr.) and the attainder of the Gunpowder plotters (30 April).
Holcroft did not believe the charge that Sir William Maurice had attended mass, and therefore argued that Maurice should be allowed to listen to the debate (1 February). The Commons disagreed and, after Maurice made a statement Holcroft and others urged him to withdraw. After Maurice was cleared, Holcroft demanded unsuccessfully that his accusers be censured.
and some justices being lord of some one or two towns, having reduced his tenants even to beggary by extreme racking of them, will and often do relieve such poor upon the forfeitures and penalties of the inhabitants of another town within that parish, who, living under a more conscionable landlord are of more ability and live well.
The bill was accordingly recommitted, but the proposed alteration was not accepted, and therefore when the measure was reported two days later Holcroft moved to add a proviso, but without success.
Holcroft argued in favour of increased supply on 14 Mar. and four days later acted as a teller in the division. He also participated in debates on the bill for fees in Courts of Record (14 Feb.) and on Sir Roger Aston’s greenwax patent (15 Apr.) but his words have gone unrecorded.
Although he did not play a significant role in debate in the third session of 1606-7, Holcroft took an interest in the Union. On 21 Nov. he was named a commissioner for the Union and three days later was appointed to a joint conference on the subject.
Holcroft’s main activity in the fourth session was to pursue the punishment of Sir Stephen Procter. On 5 May he was appointed to collect information against Procter, and was accordingly named to a committee on 15 June. On 19 July he was the first to suggest that Procter should be exempted from the pardon, and he stressed that the Commons should present a clear, point-by-point case against him.
As in previous sessions, Holcroft was named to consider several measures of general interest to the gentry: cloth (23 Feb.), preservation of wood, game (22 Mar.), husbandry (27 Mar.), suits against magistrates (28 Mar.), the Marshalsea Court, hawking (29 Mar.), copyholders (31 Mar.) and swearing (30 May).
Nothing is known of Holcroft’s activity in the poorly recorded fifth session. After the Parliament, Holcroft embarked on a process of selling his Cheshire estates (which Chamberlain later described as impoverished). In 1616 he sold Vale Royal to the widow of Sir Hugh Cholmondeley and took lodgings in London.
