 However, when Frederick visited Mackenzie's office on 2 August for a follow-up examination, the growth had reappeared, necessitating its cauterisation the same day, and again on 8 August – an ominous indication that it was indeed malignant.Felix Semon, a distinguished German throat specialist with a practice in England, and who had been closely following Frederick's case, submitted a report to the German Foreign Secretary in which he strongly criticised Mackenzie's cauterisations, and gave his opinion that the growth, if not malignant, was suspect, and should continue to be biopsied and examined.On 9 August, Frederick travelled to Braemar in the Scottish Highlands with Dr. Mark Hovell, a senior surgeon at the Throat Hospital in London.