As in most mysteries, there were other conjectures more or less improbable.
Years afterwards it was put down to the account of Palmer the poisoner, who it was said had administered strychnine to Lord George as he did to some other members of the aristocracy.
But what was Palmer's motive?
Had Lord George and he any betting transactions together in which Palmer had lost, and finding himself unable to pay, destroyed his noble creditor with diabolical secrecy?
Yet Palmer in 1848 was a young doctor, aged about twenty-three, just setting out on his professional career.
It was not until a few years afterwards that Palmer commenced to turn his attention to turf transactions, therefore it is difficult to find a motive which should be some evidence against him as the perpetrator of this crime.
The case of Palmer was an extraordinary one. He was a medical practitioner at Rugeley in Staffordshire, and having become infatuated with betting had no scruples about removing those to whom he had contracted debts of honour. It was not till the early months of 1856 that light was shed upon some of his fiendish designs and after a long trial he was sentenced to be hanged at Stafford gaol.
Palmer boasted of his racing transactions with the aristocracy, and if Lord George was one of his victims seven years before 1856, the miscreant had had plenty of time to harden his conscience in working his foul plots against others whom it was his sordid interest to destroy.
Another wild theory was that there had been a quarrel between the Marquis of Titchfield and Lord George.
One reason for the dispute was alleged to be that Lord George had been a heavy loser instead of a gainer by his gigantic gambling operations, that he was in want of money, either from his brother the Marquis, or his father, the Duke.