In Chapter X of J.R.R. Tolkien's work, the author employed various techniques to create a sense of suspense at the end. For example, Tolkien may have used descriptive language to build tension, leaving the reader on the edge of their seat. He might have introduced a cliffhanger, leaving unresolved conflicts or unanswered questions. Additionally, the pacing and structure of the chapter might have been carefully crafted to increase suspense, such as by building up to a climactic moment or ending with a surprising twist. To provide a more specific analysis, it would be helpful to know which book or work by Tolkien you are referring to.