The son of General Sir George Hewett, he served in five regiments during the wars of the fifth and sixth coalition.
[5] Around this time he served in the Napoleonic Wars, in the ill-fated Walcheren Campaign and under Admiral James Saumarez in the Baltic Sea.
[6] Seven days later Hewett was transferred to the 33rd (or First Yorkshire West Riding) Regiment, taking the place of a deceased officer.
[8][5] With the return of exiled emperor Napoleon to France in 1815, during the Hundred Days, the British Army rapidly remobilised.
[5] In his later life, Hewett lived at East Park Terrace in Southampton and was cared for by his daughter.
[2][1] Hewett was a notable veteran of Waterloo and the Rifle Brigade wrote to him on the battle's anniversary each year to congratulate him.
[1][5] Hewett was buried at Southampton Old Cemetery, which also held the grave of fellow Waterloo veteran, Private John Russell, of the 3rd Regiment of Foot (d. 1864).