All txg values align so this is a good start.
See if zpool import -fF -n Murphy immediately throws an error. If it does, please give me the output of tail -n 200 /proc/spl/kstat/zfs/dbgmsg inside of codeblocks.
If the zpool import does not throw an error and instead tells you “can be rewound to time X” or simply goes to a newline then the next step is to try a read-only import:
zpool import -fF Murphy -R /mnt -o readonly=on
If that works, check your /mnt/Murphy path for your files, and zpool status for health. If it fails, get the tail dbgmsg from above.
If the read-only import works, your files look like they’re present, and zpool status -v says you’re okay - then export the pool with zpool export Murphy before importing for good with zpool import -fF Murphy -R /mnt and that should commit the changes. Once that’s done, issue a scrub, reboot the system and it should auto-mount.