Source
The source code of each release of Ascham, in two files: a git bundle of the release's repository, its one commit and its tag, and a tar.gz archive of its files.
How to build it, and check that it matches the site, is in README.md and VERIFY.md, inside each download.
Ascham 1.4.0: ascham-1.4.0.bundle, ascham-1.4.0.tar.gz