A plain account
Eisenmann described forms of physical correction in his own writing. The site does not sanitise that material, but it also does not present it as recommended practice or reproduce it as instruction.
Context, not endorsement
His accounts also emphasised praise, routine, attention and repetition. Those elements do not erase the physical methods. Together, they show a historical approach shaped by its period, its public-performance setting and Eisenmann’s own beliefs.
Why the boundary matters
Readers deserve an accurate account without sensationalism. The useful question here is what Eisenmann said and did, how it was presented, and where the record is limited, not whether a historical account can be turned into present-day advice.