"The little cardinal" was to die from diphtheria despite an operation to restore his airway by Harriet's brother, Dr John Bowie. Within days Harriet and John also died from diphtheria. A river steamer,
Henry Henderson, acquired by the Blantyre Mission in 1892, was named in his honour. She was crewed by African graduates of the Mission, and operated as a floating church and school on
Shire River, the biggest river in Malawi. The
Henry Henderson Institute, an educational institute in Blantyre, was named in his honour; it opened in 1909 within the grounds of
St Michael and All Angels Church, Blantyre. The institute had an infant and secondary school, a theology and a teacher training college. Trades taught included printing, which enabled the institute to publish a wide variety of texts. In 2021 it was announced that the school would close indefinitely as a result of indiscipline. In 1892, William Robertson published
The Martyrs of Blantyre which he identified as Henry Henderson, Dr. John Bowie and Robert Cleland. A plaque also appears on the church recording the people from the mission who lost their lives. The first three are Robert Cleland, John Bowie and Henry Henderson. == References ==