<i>Rayathang Phra Chao Nongya Thoe Krommamuen Damrong Rachanuphap Sadet Pai Truat Ratchakan Huamueang Fai Nuea</i> ("Voyage of HRH Krommamuen Damrong Rajanubhab the Royal Younger Brother to Inspect the Governmental Affairs of the Northern Provinces"), being a record of an expedition of Prince <a href="https://en.wikipedia.org/wiki/Damrong_Rajanubhab" class="extiw" title="w:Damrong Rajanubhab">Damrong Rajanubhab</a>, younger brother of King <a href="https://en.wikipedia.org/wiki/Chulalongkorn" class="extiw" title="w:Chulalongkorn">Chulalongkorn</a> and minister of interior of Siam, to inspect governmental affairs in <a href="https://en.wikipedia.org/wiki/Northern_Thailand" class="extiw" title="w:Northern Thailand">Northern Siam</a> from 22 October 117 Rattanakosin Era (2441 Buddhist Era, 1898 Common Era) to 14 January 117 RE (2441 BE, 1899 CE); written by an unknown author; first published in the Royal Siamese Government Gazette.
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Unknown author<span style="display: none;">Unknown author</span></div>
"<a rel="nofollow" class="external text" href="http://www.ratchakitcha.soc.go.th/DATA/PDF/2441/045/477.PDF">ระยะทางพระเจ้าน้องยาเธอ กรมหมื่นดำรงราชานุภาพ เสด็จตรวจราชการหัวเมืองฝ่ายเหนือ</a>". (๒๔๔๑, ๕ กุมภาพันธ์). <i>ราชกิจจานุเบกษา</i>. เล่ม ๑๕, ตอน ๔๕. หน้า ๔๗๗–๔๘๒.