The guard placed over this large body of prisoners was small, and to overawe the prisoners all the marines from the ships were landed every evening at sunset and marched with fixed bayonets to the fort, with orders to make as much noise and clatter as they could; and then at night, when all was still, they stole silently away from the fort and returned on board. So well was the ruse practised every day that the prisoners were under the impression that they were guarded by a large body, and never suspected the truth. The time at the fort was not very pleasant to the marines on guard, as the place was filthy and literally swarmed with fleas, and their white drill suits were so covered with these detestable insects that the marines appeared to be dressed in brown instead of white clothing. This was Mr. Bignell's only taste of active service. When the _Superb_ was paid off he was employed in several offices in the barracks, first as commanding officer's clerk, and afterwards he was appointed to the barracks at Millbay as barrack sergeant, and he held this appointment for seven years. By the end of this time he had served twenty-two years. Throughout all this time he had been a keen and close observer of nature. From his boyhood up natural history had exercised a great attraction for him, and as he grew up, and studied, the subject became more and more interesting. During his last seven years of service he made considerable progress, for as a barrack sergeant he had little work to do, and so had plenty of time to devote to his hobby. After being discharged he became a member of the Plymouth Institution, with the object of finding out the names of some of the insects he had captured, and was surprised to find that it had nothing like them in its collection, nor could anybody tell him what they were. [Illustration: JOHN RALFS _Reproduced by permission of Miss Loveday E. Drake_] Mr. Bignell had barely retired from the service ere he was appointed Registrar of Births and Deaths for the Stonehouse district and also Poor Law Officer to the Stonehouse Board of Guardians; but his residence is in Saltash. All his spare time has for many years been given up to scientific pursuits, the branch of science to which he is most partial being entomology; but since his residence in Saltash he has been a profound student in marine flora. It is not only in the study of the known and hitherto unregistered insects that Mr. Bignell has acquired a world-wide fame; he has specially taken up the subject, hitherto almost untouched, of the parasites that live on insects.