James B. Hendryx -- First Pulp Publication

Zeke has worked out when many of the novels were first published in pulp magazines. For those marked "unknown", there's no evidence they were serialized. Here's his list:
PulpNovel
1914Marquard the Silent
1915The Promise
1916The One Big Thing
1917The Gun Brand
1918The Texan
1920The Gold Girl
1920Prairie Flowers
1921Snowdrift
1922The Challenge of the North
1922North
1922Without Gloves
1923Realm of the Mounted / Foot of the Rainbow
1924Oak and Iron
1925Downey of the Mounted
1927Frozen Inlet Post
1928Gold--and The Mounted
1929Man of the North
1930Blood on the Yukon Trail
1931Corporal Downey Hits the Trail
1933Raw Gold
1933The Yukon Kid
1936Grubstake Gold
1938White Blood--and Red / Blood of the North
1939Edge of Beyond
1940Hard Rock Man
1941Gambler's Chance
1942New Rivers Calling
1944Way of the North
1945Young Man's Country / Courage of the North
unknownOn the Rim of the Arctic (1948) / The Long Chase (1952)
unknowMurder in the Outlands
unknowThe Stampeders
unknowSourdough Gold
unknowGold is Where You Find It
unknowGood Men and Bad