The Battery returned to Egypt in November 1915 before participating in the Senussi Campaign in December 1915. This raid was organised by the Duke of Westminster with his armoured car Battalion. Sir Archibald became extremely ill with dysentery and jaundice at this time and was shipped back down the coast to Alexandria in the hold of a cattle boat. His brother officers never expected to see him again, but his strong constitution enabled him to recover sufficiently to be shipped back to England in January 1916, where he recovered but was no longer fit for service overseas.