_The Boston Transcript_:--"In 1913 Mr. Grierson wrote a volume of essays called 'The Invincible Alliance' in which he outlined very clearly the dangers which lay before the two great English-speaking nations. Re-reading these essays in the light of the last four years we can see that Mr. Grierson looked even more deeply into the future and that he predicted much which has come to pass since the war began."
_The Herald, Washington, D. C._:--"Since the publication of the 'The Invincible Alliance' nothing has appeared in book form to surpass the trenchant vigour and illuminating insight of 'Illusions and Realities of the War.'"
_M. Sully Prudhomme, of the French Academy_:--"J'ai trouvé ces méditations pleines d'aperçus profonds et sagaces. J'ai été frappé de l'originalité puissante de la pensée de l'auteur."
_Maurice Maeterlinck_:--"This volume is full of thoughts of the very highest order. You have deliciously and profoundly surprised me. You have said so many things which I should like to have written myself."
_A. B. Walkley, dramatic critic of the London Times_:--"Modern Mysticism is an original and delectable book."
_The London Telegraph_:--"Mr. Grierson pierces to the heart of his theme with a keenness that is almost disconcerting. He illumines the most obscure situation by one of his sudden flashes of insight. The poise of his sentences has something of Gallic precision about it and it is not surprising that savants of contemporary French literature have praised his work with generous emphasis. Such an influence, working like leaven in the lump, cannot fail to make its presence appreciated."
_Arnold Bennett, in a long review_:--"'The Valley of Shadows' is a noble book.... Mr. Grierson's descriptions possess a detaching sentiment of beauty with absolute visual quality."
_The New York Times_:--"Perhaps at last, before oblivion closes over the ante-bellum days in Illinois, the laureate of the Lincoln Country has arrived. If there is another book in existence which deals so graphically and so faithfully with that period we do not know of it."
_The Literary Digest_:--"Grierson's description of Lincoln as he stood before Douglas at Alton, is more real, more lifelike, than any statue or picture, and will in future ages take rank with Balzac's description of Dante."