This volume compiles concise biographical sketches of individuals who died since 1850, covering entries whose names fall between I and Q. Each entry typically lists birth and death details, education, career highlights, notable publications or works, offices and honours, and references to obituary notices or portraits. Arranged alphabetically for quick reference, the collection includes figures from varied fields—architecture, politics, science, clergy, and sporting life—and provides compact factual summaries and cross-references to periodical sources and indexes to aid further research.