Serialization The End of the Tether
in The Famous Story Magazine (London, UK) (May 1926 — Sep 1926):
Vol. II, No. 1 (May 1926): (Page imagery not yet available)
Vol. II, No.2 (Jun 1926): (Page imagery not yet available)
Vol. II, No.3 (Jul 1926): (Page imagery not yet available)
Vol. III, No. 1 (Aug 1926): (Page imagery not yet available)
Vol. III, No. 2 (Sep 1926): (Page imagery not yet available)
View in Internet Archive BookReader (experimental).
Reprint of the January 1926 (US) issue.