http://www.scsh.net/docu.html has a list of libraries shipping with
scsh. There is an entry for SRFI 19 (time datatypes), which indeed is
shipped with scsh. But there is no structure "srfi-19" which is
indicated in the structure column. Unless I'm mistaken about the
existence of a "srfi-19" structure, the structure column for SRFI 19
should probably be cleared accordingly.
I got confused why it wasn't possible to open "srfi-19" and after a
while discovered that there is no such structure. The other
structures mentioned in the table seem to exist.
A quick glance at the end of more-packages.scm seems reveals that
there seem to exist structures for SRFI 25, 26, 27 and 28 too, which
are not included in the table.