A royal proclamation on elevation of the title of the ruler of <a href="https://en.wikipedia.org/wiki/Syburi" class="extiw" title="w:Syburi">Sai Buri</a> from <i>Phraya Sai Buri</i> to <i>Chaophraya Sai Buri</i> dated 29 August 114 <a href="https://en.wikipedia.org/wiki/Thai_solar_calendar#Rattanakosin_Era" class="extiw" title="w:Thai solar calendar">RE</a> (2438 <a href="https://en.wikipedia.org/wiki/Thai_solar_calendar#Buddhist_Era" class="extiw" title="w:Thai solar calendar">BE</a>, 1895 <a href="https://en.wikipedia.org/wiki/Common_Era" class="extiw" title="w:Common Era">CE</a>), as published in the <i><a href="https://en.wikipedia.org/wiki/Royal_Thai_Government_Gazette" class="extiw" title="w:Royal Thai Government Gazette">Royal Thai Government Gazette</a></i> on 1 September 1895 <a href="https://en.wikipedia.org/wiki/Common_Era" class="extiw" title="w:Common Era">CE</a>.
Government of Siam (now Thailand).
1895-09-01
"<a rel="nofollow" class="external text" href="http://www.ratchakitcha.soc.go.th/DATA/PDF/2438/022/190.PDF">Prakat nai kanluean yot phraya sai buri pen chaophraya sai buri long wan thi yisip kao singhakhom rattanakosin sok nueng roi sip si (phutthasakkarat song phan si roi samsip paet)</a>" [Proclamation on elevation of the title of Phraya Sai Buri to Chaophraya Sai Buri dated 29 August 114 <a href="https://en.wikipedia.org/wiki/Thai_solar_calendar#Rattanakosin_Era" class="extiw" title="w:Thai solar calendar">RE</a> (2438 <a href="https://en.wikipedia.org/wiki/Thai_solar_calendar#Buddhist_Era" class="extiw" title="w:Thai solar calendar">BE</a>, 1895 <a href="https://en.wikipedia.org/wiki/Common_Era" class="extiw" title="w:Common Era">CE</a>)]. (1895, 1 September). <i><a href="https://en.wikipedia.org/wiki/Royal_Thai_Government_Gazette" class="extiw" title="w:Royal Thai Government Gazette">Royal Thai Government Gazette</a></i>. (Volume 12, Part 22). pp. 190–191.