On 25 July 1914, the Austro-Hungarian Minister of Foreign Affairs, Leopold Count Berchtold (pictured), sent a coded private telegram to the First Section Section Chief at the Austro-Hungarian Ministry of Foreign Affairs, Baron Karl von Macchio. In his telegram, Berchtold instructs Baron Macchio that the term for the Austro-Hungarian ultimatum to Serbia would not be prolonged.
Count Berchtold to the Imperial and Royal Ministry of Foreign Affairs. Lambach, 25 July 1914
For Baron Macchio [First Section Chief at the Ministry of Foreign Affairs].
The Russian Chargé d’Affaires has telegraphed me that he has been urgently instructed by his government to demand a prolongation of the term for the ultimatum to Servia. I beg your Excellency to answer him in my name that we cannot concede a prolongation of the term. Moreover, your Excellency will add that even after the breaking off of diplomatic relations the unconditional acceptance of our demands could bring about a peaceful solution, but that in this case we should be obliged to demand reimbursement for the expenses incurred by military measures.
I beg your Excellency to inform the German Ambassador [to Austria-Hungary] of the above.
Source: 1919 Austro-Hungarian Red Book, with minor edits.