The Library has two books which have information that might help you select a traveler.
They are both available online as electronic books.
Here are the title links. The link will take you into OneSearch where you will want to click on the link within the "View Online" box on the page.
The Routledge Companion to Travel Writing. See the chapters by Johanna Holmberg on "The Middle East" and Nabil Matar on "Arabic Travel Writing to 1916."
Travellers to the Middle East from Burckhardt to Thesiger : an anthology. In this book there are several pages which give a range of travelogues in English.
For your travelers, you may find many, if not all of their travel writings in either print or eBook form using OneSearch.
The best way to discover these writings is to do a search with traveler's name (author) as your main search keywords. You can also combine the author's name with a title. Be aware though that some works do not have titles or titles might be different.
If you encounter any problems accessing articles, please feel free to contact me and I will help you find it!