author
Known today for a technical study of railroad operation, this early-20th-century engineer wrote clearly about how locomotives performed on long grades and why careful route design mattered.

by B. S. (Beverly S.) Randolph
Very little biographical information about B. S. (Beverly S.) Randolph was easy to confirm from reliable online sources, but Project Gutenberg identifies this author as Beverly S. Randolph and credits a surviving work, Transactions of the American Society of Civil Engineers, Vol. LXX, Dec. 1910: Locomotive Performance on Grades of Various Lengths.
That work presents Randolph as a member of the American Society of Civil Engineers and shows a practical, data-minded interest in railroad performance. The piece focuses on how locomotives handled grades of different lengths, reflecting the real engineering problems of railway construction and operation in the early 1900s.
Because dependable biographical records were limited in the sources I could confirm here, it is safest to remember Randolph mainly through this publication: a concise example of serious engineering writing from the age of steam railroads.