William Wylie Grierson is not widely recognized in the pantheon of literary figures, yet his contributions hold a certain niche significance within the realm of railway literature. His authorship of 'Great Western Railway Instructions' situates him as an authority on the operational nuances and regulations that were vital to the efficient and safe management of railway services. Although the breadth of Grierson's literary works may seem specialized, the 'Great Western Railway Instructions' stands as a testament to the meticulous standards and systematic governance required in the rail industry during his time. The book evidently targets a readership among those in professions connected to railway operations rather than a general audience, offering them comprehensive guidance rooted in the expertise of the era. Grierson's style is likely to be functional, reflecting the technical and procedural focus of his writing. Moreover, the absence of broader literary fame does not detract from the utility and historical value of his work, which provides insights into the regulatory frameworks and instructional methods of past railway enterprises. Nonetheless, without more extensive biographical details or a diversity of works, our view of Grierson's literary legacy is naturally limited to the scope of his known publication.