As far as I can figure out, this is Volume 4 in THE BEST OF THE WEST series, as edited by BILL PRONZINI and MARTIN H. GREENBERG, another excellent collection of classic and well-written Western short stories, this anthology devoted to THE RAILROADERS, those who made their living by working on the railroads, as well as those individuals who attempted to rob railroad trains.  Contents:

BILL PRONZINI & MARTIN H. GREENBERG -- Introduction

Anonymous -- CASEY JONES (song lyrics)

O. HENRY -- The Passing Of Black Eagle

CLARENCE E. MULFORD -- The Holdup ( a HOPALONG CASSIDY story)

FRANK H. SPEARMAN -- The Yellow Mail

JAMES STEVENS -- C. P. R.

TOM W. BLACKBURN -- Song Of The Steel Rails

CHARLES W. TYLER -- The Angel Of Canyon Pass

CLAY FISHER -- For Want Of A Horse

WAYNE D. OVERHOLSER -- Steel To The West

H. L. DAVIS -- Flying Switch

GILES A. LUTZ -- Westward Rails

JEFFREY M. WALLMANN -- The Phantom Train Robbers

JOHN JAKES -- Hell On The High Iron

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