Opposite the foreword to Dr. Dunham's book is the following quotation from J. W. Ballantyne:
In writing this book, I have honestly tried to avoid the four grounds of human ignorance set forth so long ago by Roger Bacon: Trust in inadequate authority, the force of custom, the opinion of the inexperienced crowd and the hiding of one's own ignorance with the parading of a superficial wisdom.
Dr. Dunham's integrity, judgment and wide experience have enabled her to weigh the merits of the literature on the premature infant, and one may feel sure that the numerous authorities and statistics which she cites are thoroughly reliable. Nor does she carry over from custom or hearsay unfounded opinions. She certainly does not try to hide ignorance with a parade of superficial wisdom. The only possible adverse criticism is that she is too modest concerning her own achievements and her own wisdom.