I happen to be very much of a biochemist by training and I'm a very poor morphologist. I had considerable trouble when I was a medical student in remembering things like anatomy and microscopy, histology and pathology. I could not recognise anything in a cell, in a microscope; I could only see the red blood cells in my own retina. So I've never used my eyes very much for studying and so – I of course didn't mention this, I'm glad you asked – when we had characterised the lysosomes, eventually, as a good biochemist would do with a molecule, having characterised them, we devised techniques for purifying them and so, eventually, we... we were able to make highly purified preparations of lysosomes the way a biochemist would get a crystal in protein... the same kind of thing. And then, eventually, we went and looked at them in the electron microscope because, by then, I had amazingly been able to receive from the Belgian National Science Foundation what was about the first electron microscope that they had given, and all my morphological colleagues were livid with rage that the electron microscope should be given to a biochemist and not to a morphologist. Anyway, tout ça c'est de l'histoire ancienne. Anyway, we did finally look in the electron microscope, and we found that these little bodies that we had called lysosomes had been seen by electron microscopists who had called them pericanalicular dense bodies. Dense because they look dense, because they're filled with undigested residues – that's why they're dense, because, even in normal cells, sometimes you get residue that cannot be digested. And pericanalicular because they are around bile canaliculi in the cells, so we ended up doing a lot of morphological work and many of my co-workers did cytochemistry, immunochemistry, radiochemistry, you name it, they did it, but I was never much involved in that because the morphological techniques were not really my... my cup of tea.