Complex sentence: At that time, one lord in Shkodër wrote a letter to the Sultan, telling that if the Ottomans sent some troops to Bosnia and Albania to protect him, he would recognise the sovereignty of the Ottomans and aid them.
Split into simpler sentences: At that time, one prince in Shkodër wrote a letter to the Sultan. In the letter this prince wrote that if the Ottomans sent some troops to Bosnia and Albania to protect him, he would recognise the sovereignty of the Ottomans and aid them.