 One of Berhtwald 's letters has been preserved , sent to Forthhere , Bishop of Sherborne , and asking Forthhere to intercede with Beorwold , the Abbot of Glastonbury , to ransom a slave . Another letter , this one addressed to Berhtwald , from Waldhere , Bishop of London , also survives . The main interest in the second letter is that it is the oldest surviving letter close surviving in Western Europe . This second letter also relates that Waldhere and Berhtwald had attended a synod which can be dated to sometime between 703 and 705 , where the kingdom of Wessex was threatened with excommunication . A charter witnessed by Berhtwald which mentions a supposed 706 council , numbered 54 by Sawyer , is now known to be a fake , although the witness list may be based on a legitimate 8th century charter that no longer survives . Likewise , a charter with Berhtwald as a witness and relating to the 716 Council of Clofesho is also known to be a 9th @-@ century forgery , although again it may have been based on actual documents from the council . 
 One of Berhtwald <a href='null_genetive' title='1'><mark>'s</mark></a>letters <a href='been_done' title='2'><mark>has</mark></a> been preserved , sent to Forthhere , Bishop of Sherborne , and asking Forthhere to intercede with Beorwold , the Abbot of Glastonbury , to ransom a slave . Another letter , this one addressed to Berhtwald , from Waldhere , Bishop of London , also <a href='uninflect' title='3'><mark>survives</mark></a> . The main interest in the second letter is that it is the oldest surviving letter close surviving in Western Europe . This second letter also <a href='uninflect' title='4'><mark>relates</mark></a> that Waldhere and Berhtwald <a href='been_done' title='5'><mark>had</mark></a> attended a synod which can be dated to sometime between 703 and 705 , where the kingdom of Wessex was threatened with excommunication . A charter witnessed by Berhtwald which <a href='uninflect' title='6'><mark>mentions</mark></a> a supposed 706 council ,<a href='been_done' title='7'><mark></mark></a> numbered 54 by Sawyer , is now known to be a fake , although the witness list may be based on a legitimate 8th century charter <a href='null_relcl' title='8'><mark>that</mark></a>no longer <a href='uninflect' title='9'><mark>survives</mark></a> . Likewise , a charter with Berhtwald as a witness and relating to the 716 Council of Clofesho is also known to be a 9th @-@ century forgery , although again it may <a href='been_done' title='10'><mark>have</mark></a> been based on actual documents from the council . 
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