Question: When did Charles Somers-Cocks, 3Rd Earl Somers's father die?
Answer: 5 October 1852

The Countess Somers died in 1910. John Somers Somers-Cocks, 2nd Earl Somers (19 March 1788 – 5 October 1852), styled Viscount Eastnor between 1821 and 1841, was a British peer and Conservative Party politician. Somers was the second son of John Cocks, 1st Earl Somers; his older brother Edward Charles Cocks died in the Peninsular War