| Constituency | Dates |
|---|---|
| Chichester | 1722 – 27 May 1723 |
Guidon 1 tp. Life Gds. 1721; capt. 1 Horse Gds. 1722; a.d.c. to the King 1724 – 32; col. 1724; brig.-gen. 1739; maj.-gen. 1742; lt.-gen. 1745; gen. 1745; col. 1 Horse Gds. 1750 – d.
Ld. of the bedchamber to the King 1726 – 35; ld. high constable 1727; master of the horse 1735 – d.; P.C. 9 Jan. 1735; mayor, Chichester 1735; e. bro Trinity House 1737 – d., master 1741–5: ambassador to France 1748–9; high steward, Chichester 1749.
At the age of 18 Lord March was married to the 13 year old daughter of the 1st Earl Cadogan to cancel a gambling debt between their parents. Leaving immediately after the marriage for his grand tour, he did not meet his bride again until he returned in 1722, when, seeing her at the theatre without recognising her, he at once fell in love with her.1C. Lennox, A Duke and his Friends, i. 34-35, 58. Returned on the Goodwood interest in 1722, he succeeded to the dukedom a year later. As Duke of Richmond he took an active part in Sussex elections, always recommending one of the Members for Chichester, of which he was the patron; unsucessfully attempting to develop an interest at Arundel and New Shoreham; and vigorously supporting his friend the Duke of Newcastle in the county. His frequent letters to Newcastle bear out Hervey’s description of him:2Mems. 252.
Friendly, benevolent, generous, honourable and thoroughly noble in his way of acting, talking and thinking; he had constant spirits, was very entertaining, and had a great deal of knowledge.
He died 8 Aug. 1750.