From Biographical Memoirs of Huntington County, 1901 pages 296-297
Boston H. B. Grayston, M. D., eldest of son of Dr. Frederick S. C. Grayston, was born in Brighton, England, May 12, 1850, and when but five months old was brought by his parents to the United States. Reared to manhood in Huntington, Indiana, he early entered the city schools, and after completing his preliminary education entered Asbury (now De Pauw) University, in which he finished the Sophomore year. He then began reading medicine in his father's office, and when about twenty years of age entered the Chicago Medical College, where he pursued his professional studies for three years, at the same time taking a course in the Chicago School of Anatomy, in both of which institutions he made rapid and commendable progress. After his graduation, in March, 1875, he began practicing with his father, a professional relationship only severed by the death of the latter, and his career thus far presents a series of continued successes which attest the high standing he has achieved as a physician and surgeon. In 1878 the Doctor received the Ad eundem degree from the Fort Wayne Medical Collage, and in 1882 took a post-graduate course in Rush Medical College, where he made a specialty of surgery, a department of the profession in which he has since won more than local repute, and in 1892 took the polyclinic course in Chicago. For a number of years he has been chief surgeon of the Chicago & Erie Railroad, while in his general practice he is frequently called to adjoining towns and cities to perform or assist in critical operations requiring more than ordinary skill.
Dr. Grayston stands at the head of his profession in Huntington county, the reputation being awarded him of being one of the ablest physicians and surgeons in northern Indiana. He combines with deep theoretic knowledge the happy faculty of applying the same, and by reason of his kindly presence and sympathetic touch he has long been recognized as the ideal family physician.
Dr. Grayston was married June 19, 1877, to Miss Mary C. Slack, youngest daughter of the late General James R. Slack, one of Indiana's prominent jurists and most distinguished military men. To this union were born children as follows: Wallace Slack, student in the Northwestern Medical College, of Chicago; Hayden Boston; Isabelle C.; and Mary E. V.
The Doctor is a member of the National, State and County Medical Societies, and takes an active interest in the deliberations of each when attending their sessions. He succeeded his father as pension examiner, and for several years discharged the duties of the position in a manner creditable to himself and satisfactory to the government.
Politically he is a Republican, but in no sense an aspirant for the honors of office, preferring to devote his entire attention to the duties of his profession. His wife is a member of the Christian church in Huntington.