A Plain notebook full of notes, which changed the face of science. Understanding Relativity through this notebook is really difficult so I suggest just take a look and enjoy. Everybody knows who Einstein was and his work, but it’s rare that we get to experience his work directly from the source. These photos are maybe the notes of his 4-part lecture which he offered at The Prussian Academy of Sciences in 1915 or They could also relate to the lecture he presented at the University of Manchester in 1921 (Einstein’s First Lecture in Britain – The Guardian, 1921), but this is not confirmed.