The Elements of Geometrie by Henry Billingsley (source code)

= The Elements of Geometrie by Henry Billingsley
{c}
{tag=Work by Henry Billingsley}
{title2=1570}

English <Euclid> translation with commentary. The Text Creation Partnership transcription identifies the title page and Book VII, Definition 23. Modern numbering of the corresponding <perfect number> definition is VII.22. The linked repository also records the transcription's bibliographical provenance.

Online source: https://github.com/textcreationpartnership/A00429