The dodo and its kindred; Or, the history, affinities, and osteology of the dodo, solitaire, and other extinct birds of the islands Mauritius, Rodriguez and Bourbon.

The first separate monograph on the dodo, an extinct flightless bird that was endemic to the island of Mauritius, east of Madagascar in the Indian Ocean. "The closest genetic relative to the dodo was the also extinct Rodrigues solitaire, the two forming the subfamily Raphinae of the family of pigeons and doves. The closest living relative of the dodo is the Nicobar pigeon" (Wikipedia).  Strickland was run over by a train at the age of 42. Digital facsimile from the Internet Archive at this link.