Do sources still exist for Perl 4 and earlier? I decided to go looking for when Perl got verbose regex. The oldest thing I can find on perldoc.perl.org or cpa

Do sources still exist for Perl 4 and earlier? I decided to go looking for when Perl got verbose regex. The oldest thing I can find on perldoc.perl.org or cpan.org is 5.004 (1997), where they were an existing feature. EDIT: Found 4.036 sources (1993). A quick scan of the man page (troff source!) does not find verbose regular expressions. So it looks like they were introduced very early in the Perl 5 series. https://www.cpan.org/src/unsupported/4.036/ https://www.cpan.org/src/unsupported/4.036/