The following books are viewable at Google Books (if you're in the US, at least):

Sun and Saddle Leather, by Charles Badger Clark, Jr. (Boston: Richard G. Badger, 1917)

CONTENTS:

A Bad Half Hour 17
A Border Affair 26
A Cowboy's Prayer 21
A Roundup Lullaby 37
Bachin' 41
Bacon 46
From Town 19
God's Reserves 49
Ridin' 13
The Bunk-House Orchestra 28
The Christmas Trail 23
The Glory Trail 43
The Legend of Boastful Bill 32
The Lost Pardner 47
The Married Man 51
The Old Cow Man 54
The Outlaw 30
The Plainsmen 57
The Song of the Leather 15
The Tied Maverick 35
The Trail o' Love 39
The Westerner 59

Grass-Grown Trails by Badger Clark (Boston: Richard G. Badger, 1917)

CONTENTS:

A Ranger 16
Freightin' 34
God of the Open 57
Half-Breed 28
Hawse Work 26
Latigo Town 60
On the Drive 19
On the Oregon Trail 46
Saturday Night 21
Southwestern June 22
The Bad Lands 43
The Border 40
The Buffalo Trail 62
The Camp Fire's Song 63
The Coyote 9
The Forest Rangers 48
The Free Wind 10
The Locoed Horse 30
The Long Way 32
The Medicine Man 12
The Night Herder 24
The Old Prospector 55
The Passing of the Trail 58
The Piano at Red's 14
The Rains 37
The Sheep-Herder 51
The Springtime Plains 45
The Yellow Stuff 49
To Her 29

Sun and Saddle Leather: Including Grass Grown Trails and New Poems by Badger Clark, 11th edition, (Boston: Richard G. Badger, 1922)

[These are the "new poems":]

Battle 198
In the Hills 200
Jeff Hart 196
My Enemy 187
Others 194
Plains Born 183
The Fighting Swing 189
The Old Camp Coffee-Pot 185
The Smoke-Blue Plains 192