ftp://ftp.cse.buffalo.edu/pub/FreeBSD-Archive/old-releases/i386/4.6-RELEASE/compat21/  direct

158 B  1998-09-21install.sh  1000+ mirrors
268 B  2002-06-10CHECKSUM.MD5  950+ mirrors
235.00 KB  2002-06-10compat21.aa  300+ mirrors
69 B  2002-06-10compat21.inf  106 mirrors
203.46 KB  2002-06-10compat21.ab  17 mirrors
1.37 KB  2002-06-10compat21.mtree  39 mirrors