I'm trying to trace these five articles: 

1)  “Mystic Dartmoor”, in: Travel. , November 1910, Vol. 16, p34-36.[art.] [Database: Humanities & Social Sciences Index Retrospective: 1907-1984 (H.W. Wilson)]

2) “The Spirit of Piccadilly”, in: The International: A Review of Two Worlds [New York, The Moods Publishing Company, 1908-1918], Vol. 7-8, (1913), p.??   [art.][on the gay scene in London, same published in California Outlook, Vol. 14. (1913), p.12.]

3) “Berlin a modern Babylon.”, in: Travel. , September 1914, Vol. 23, p14-17.[art.] [Database: Humanities & Social Sciences Index Retrospective: 1907-1984 (H.W. Wilson)]

4) “Tramping around the Isle of Wight.”, in: Travel. , December 1916, Vol. 28, p22-25.[art.][ Database: Humanities & Social Sciences Index Retrospective: 1907-1984 (H.W. Wilson)]

5) “What the Germans think of America”, in: Travel., July 1926, Vol. 47, p13-16.[art.][ Database: Readers' Guide Retrospective: 1890-1982 (H.W. Wilson)]

No.2 is at HATHI TRUST DIGITAL LIBRARY however,  
https://catalog.hathitrust.org/Record/100076260?type%5B%5D=title&lookfor%5B%5D=The%20International&ft=



I also managed to get hold of a digital copy of  4)  from the HATHI TRUST DIGITAL LIBRARY that has the following copies:

https://catalog.hathitrust.org/Record/000495599?type%5B%5D=title&lookfor%5B%5D=%22Travel%20incorporating%20Holiday%22&filter%5B%5D=topicStr%3ATravel%20Periodicals&ft=

but unfortunately not Vol. 16, 23 or 47. 

“Tramping around the Isle of Wight.”, in: Travel[1], Vol. 28. No. 2. (December, 1916),  p22-25; 46-47. [art.]

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[1] Editor, Edward Frank Allen; published monthly by Robert M. McBride & Company, Inc. Union Square North, New York City; Rolls House, Breams Bldgs., London, E.C.