GROWTH OF IDEAS 259 



passed. But many a long hour was to be spent in 

 travel after that, and he was to make one journey 

 that left Ceylon far behind him in the Indian 

 Ocean. In the spring of 1887 he made a pilgrim- 

 age to the " Holy Land," Jerusalem and the Dead 

 Sea, Damascus and Lebanon. On this journey he 

 spent a delightful month on the island of Khodos. 

 In 1889 he had a pleasant time on the beautiful 

 island of Elba. In 1890 he visited Algiers, where 

 his innocent sketches and his anatomical knife 

 brought suspicion on him ; they arrested him and 

 threatened to shoot him as a spy. He has described 

 the incident in his genial way in his Algerian 

 Eeminiscences which is, unfortunately, lost in a 

 back number of some magazine or other, like so 

 many of the sketches of his travels. In 1897 he 

 travelled over the whole of Russia, from Finland 

 to the Caucasus, and visited Tiflis, Colchis, and 

 the Crimea. In the autumn of 1892 he accompanied 

 Sir John Murray, of the Challenger expedition, 

 on a small deep-sea investigation on the coast of 

 Scotland. In the spring of 1893 and 1897 he was 

 at work once more in his beloved Messina, where 

 he was now honoured as a world-famous guest. 

 In the autumn of 1899 he climbed the Sabine and 

 Corsican hills. As the second decade after his 

 first journey to the tropics came to an end, he 

 seemed to regard all he had done so far as a small 

 payment on account. In his sixty-sixth year he 

 felt the " home-sickness " for the tropics once more 

 with such intensity that he quickly made up his 

 mind to go as far as the equator. He left Jena on 



