Let his legacy live on:
These notes have been transcribed by Brian Hill. Thanks, Brian!
On page 276, in a section called ‘Discovering all possible Lorentz trasformation laws of fields’, there’s a footnote that coolly remarks: “a person who is tired of group theory is tired of life.”
The videos at SidneyFest (a conference held in his honor in 2005 attended by the best and brightest in physics) are a great way to learn about his amazing contributions.