A story.
My hero Dr Donald Hunter now deceased took us, for the ward round, out of the hospital, down the Whitechapel Rd in the East end of London and stopped over a manhole cover. he banged on the cover and a face appeared from below and said "Oh! it's you Dr Hunter"
We all climbed down the ladder into the sewers and he gave us a talk on Leptospirosis Ictera Haemorrhgica (Weil's Disease)...an unforgettable lecture from an unforgettable Physician, the likes of which we do not see in the present time.