| Not certain of series order... #5
    seems as if it ought to precede #2, but #1 and #2 are numbered... | 
    THE MARINES HAVE LANDED -- -- illustrated by Donald S. Humphreys.
      1920, 1928. Penn.
 
LIEUTENANT COMSTOCK, U.S. MARINE -- illustrated by Donald S.
      Humphreys. 1922. Penn. 
 
THE MARINES HAVE ADVANCED -- illustrated by Donald S. Humphreys.
      1922. Penn.
CAPTAIN COMSTOCK, U.S.M.C. -- illustrated by Donald S. Humphreys.
      1922, 1923. Penn. 
 
GILES COMSTOCK, U.S.M.C.  -- illustrated by Donald S.
      Humphreys. 1923. Penn.  
   |