Collector of Customs and Salt Revenue
at Karachi, and in November, 1905, was made Superintendent in charge of
the District Gazetteer of Sind. He retired from the service in August
1906.

He married in 1883 the daughter of the Rev. J. Chalmers Blake, and left
a family of two sons and three daughters.

In 1902 he was deputed, on special duty, to investigate the prevalence
of malaria at the Customs stations along the frontier of Goa, and to
devise means for removing the Salt Peons at these posts, from the
neighbourhood of the anopheles mosquito, by that time recognised as the
cause of the deadly malaria, which made service on that frontier dreaded
by all.

It was during this expedition that he discovered a new species of
anopheline mosquito, which after identification by Major James, I.M.S.,
was named after him _Anopheles aitkeni_. During his long service there
are to be found in the Annual Reports of the Customs Department frequent
mention of Mr. Aitken's good work, but it is doubtful whether the
Government ever fully realised what an able literary man they had in
their service, wasting his talent in the Salt Department. On two
occasions only did congenial work come to him in the course of his
public duty--namely, when he was sent to study, from the naturalist's
point of view, the malarial conditions prevailing on the frontier of
Goa; and when during the last two years of his service he was put in
literary charge of _The Sind Gazetteer_. In this book one can see the
light and graceful literary touch of Eha frequently cropping up amidst
the dry bones of public health and commercial statistics, and the book
is enlivened by innumerable witty and philosophic touches appearing in
the most unlikely places, such as he alone could enliven a dull subject
with. Would that all Government gazetteers were similarly adorned! But
there are not many "Ehas" in Government employ in India.

On completion of this work he retired to Edinburgh, where most of the
sketches contained in this volume were written. He was very happy with
his family in his home at Morningside, and was beginning to surround
himself with pets and flowers, as was his wont all his life, and to get
a good connection with the home newspapers and magazines, when, alas!
death stepped in, and he died after a short illness on April 25, 1909.

He was interested in the home birds and beasts as he had been with those
in India, and the last time the writer met him he was tak