Rashleigh was the seventh of his family to represent Fowey in two centuries and ‘father of the House’ on his retirement in 1802. In 1790, after a double return, he was not confirmed in his seat until 7 Mar. 1791. Of this he wrote, 5 Nov. 1790, ‘my ambition to sit in Parliament is not so great as to give my friends the trouble they are so kind to take for me, unless I had stood in the particular situation of inheriting a claim which I cannot tamely give up’.
On 7 Apr. 1797 Rashleigh spoke against the exportation of barley. He divided with the minority on the second reading of the land tax redemption bill, 23 Apr. 1798, and particularly objected to a clause in it allowing trustees to sell freehold property to purchase the land tax, 30 May. He voted against the land tax bill on 9 May. On 18 May he voted for deferring it and also for Sir Robert Buxton’s proposal that there should be no new land tax without taxing all property. His last known speech, 18 June 1799, was on the difficulties of the copper trade, on which he attended the committee.
Rashleigh’s attendance after 1794 was affected by crippling rheumatism. Before Parliament opened in 1796 he informed his colleague Pole Carew ‘I have no inclination to fling away £50 in a journey to add one more to a majority on an address’.
