Join two Mercurial repositories into one line of revisions

Two "unrelated" Mercurial repositories are created: ``` user@SERVER ~/mercurialtest $ cd jointest/ user@SERVER ~/mercurialtest/jointest $ hg init beginning user@SERVER ~/mercurialtest/jointest $ hg init end user@SERVER ~/mercurialtest/jointest $ cd beginning/ user@SERVER ~/mercurialtest/jointest/beginning $ echo "something old..." >> data.txt user@SERVER ~/mercurialtest/jointest/beginning $ hg add data.txt user@SERVER ~/mercurialtest/jointest/beginning $ hg commit -m "Nr 1 in beginning" user@SERVER ~/mercurialtest/jointest/beginning $ echo "something old..." >> data.txt user@SERVER ~/mercurialtest/jointest/beginning $ hg commit -m "Nr 2 in beginning" user@SERVER ~/mercurialtest/jointest/beginning $ echo "something old..." >> data.txt user@SERVER ~/mercurialtest/jointest/beginning $ hg commit -m "Nr 3 in beginning" user@SERVER ~/mercurialtest/jointest/beginning $ cp -v data.txt ../end/ `data.txt' -> `../end/data.txt' user@SERVER ~/mercurialtest/jointest/beginning $ cd ../end user@SERVER ~/mercurialtest/jointest/end $ hg add data.txt # No shared changeset user@SERVER ~/mercurialtest/jointest/end $ hg commit -m "Nr 1 in end" user@SERVER ~/mercurialtest/jointest/end $ echo "new stuff..." >> data.txt user@SERVER ~/mercurialtest/jointest/end $ hg commit -m "Nr 2 in end" user@SERVER ~/mercurialtest/jointest/end $ echo "new stuff..." >> data.txt user@SERVER ~/mercurialtest/jointest/end $ hg commit -m "Nr 3 in end" ``` Is it possible and how do I join them together into one repository? I want to go from two separate repositories `beginning="o-o-O"`, `end="O-o-o"` (with a total of six commits) where they have exactly the same content in `O` to one repository `joined="o-o-O-o-o"` (with a total of five commits). My reason is that I have converted two branches into their own repositories, but I really want them in one instead. I haven´t gotten the convert to work except this way, as separate repositories.