The stories are:
HOW IT FEELS TO DIE. BY ONE WHO HAS TRIED
MERIEL STANLEY, POACHER (1900);
A STUDY FROM THE NUDE (1895);
MY ONE GORILLA (1890);
THE TRADE OF AUTHOR (1889);
A SCRIBBLER'S APOLOGY (1883).
The last two are non-fiction essays by Allen about the craft of writing in his time.Here are brief reviews by Peter Morton:
"'A SCRIBBLER'S APOLOGY'. A splendidly agonised piece about the true social worth of the journeyman writer's life, particularly the worth (if any) of the kind of 'tootler' which Allen represents himself as being. Published in the Cornhill in May 1883."
"'THE TRADE OF AUTHOR'. This remarkable article, published in the Fortnightly Review in 1889, has just been identified as by Grant Allen. (It is not attributed in the Wellesley Index.) It is a brilliant analysis of the professional writer's plight at the time, worthy to be set against Gissing's New Grub Street."
The source of these 6 stories is the website by Peter Morton, author of "The Busiest Man in England": Grant Allen and the Writing Trade, 1875-1900, published by Palgrave Macmillan, as linked from the Wikipedia page about Grant Allen.