Surat Keterangan Amir Lingga, issued 15 Rabiulawal 1330 (13 April 1912). Notes: red seal of royalty in top margin; mahkamah Lingga; 4 signatures; double folio ruled paper. Watermark: Guthrie & Co.
"The original materials are currently held at the Balai Maklumat Library, Penyengat.".
The original materials are currently held at the Museum Linggam Cahaya.
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