He settled in a grand house at 43 Foregate Street, Worcester, and built up a very large private medical practice, becoming both wealthy and well-known.

[4] Wall, was also a talented artist, producing original paintings as well as designs for bookplates and stained glass windows.

[4] It was said that "an unremitting attachment to the art of painting engaged almost every moment of his leisure hours from his infancy to his death".

When cinchona bark was first used its obvious and immediate effect in malarial fever led to the opinion that it had great and unknown powers, and must be used with extreme caution, and this essay is one of a long series extending from the time of Thomas Sydenham to the first half of the nineteenth century, when it was finally determined that the evils anticipated were imaginary, and that bark in moderate doses might be given whenever a general tonic was needed, and to children as well as to adults.

He published in the Gentleman's Magazine for December 1751 an essay on the cure of putrid sore throat, in which, like John Fothergill, he records and does not distinguish cases of scarlet fever and of diphtheria.

He was the first medical writer to point out the resemblance of the condition in man to epidemic foot-and-mouth disease in cattle, a suggestion of great importance.

He recommended olive oil for the treatment of round worms in children, in 'Observations on the Case of the Norfolk Boy' in 1758, and agreed with Sir George Baker in a letter as to the effect of lead in cider (London Med.

In 1775, he published a letter to William Heberden on angina pectoris, which contains one of the earliest English reports of a post-mortem examination on a case of that disease.

[1] His son, Martin Wall, collected his works into a volume entitled 'Medical Tracts,' which was published at Oxford in 1780.