On how Lars Magnus Ericsson arrives in Stockholm, sets out into the world, then returns home to start his own company making telephones. On his collaboration with Henrik Thore Cedergren, who had the idea that telephones could be of use to ordinary people. On how Lars Magnus creates a major industry and has to venture once more out into the world. On how Lars Magnus walks away from his life’s work, and the legacy he leaves.

“He could see in the smallest detail how the apparatus that currently occupied his mind should be constructed so that it could be manufactured in the simplest and most rational way.”