At the end of that time, I was seriously considering a move to the South Coast, a necessity forced on me by the stark reality of my rapidly diminishing finances. It had also been suggested to me that the sea air might be good for my health. Cheaper rooms in London would have been a more desirable alternative and I did very nearly take lodgings with a stockbroker on the Euston Road. The interview did not go well and immediately afterwards I made my decision. It would be Hastings: less convivial perhaps, than Brighton, but half the price. My personal possessions were packed. I was ready to go.

But then we come to Henry Stamford, not a close friend of mine but an acquaintance who had served as my dresser at St Bart’s. Had he not been drinking late the night before, he would not have had a headache and, but for the headache, he might not have chosen to take the day off from the chemical laboratory where he was now employed. Lingering at Piccadilly Circus, he decided to stroll up Regent Street to Arthur Liberty’s East India House to purchase a gift for his wife. It is strange to think that, had he walked the other way, he would not have bumped into me as I came out of the Criterion Bar and, as a result, I might never have met Sherlock Holmes.

For, as I have written elsewhere, it was Stamford who suggested that I might share rooms with a man whom he believed to be an analytical chemist and who worked at the same hospital as he. Stamford introduced me to Holmes who was then experimenting with a method of isolating bloodstains. The first meeting between us was odd, disconcerting, and certainly memorable… a fair indication of all that was to come.

This was the great turning point of my life. I had never had literary ambitions. Indeed, if anyone had suggested that I might be a published writer, I would have laughed at the thought.