"It is hard to believe that Twilight Sparkle was able to do something that Star Swirl never could." Princess Luna said to her sister Princess Celestia. The two of them were discussing the recent coronation of Celestia's student Twilight Sparkle as Equestria's newest princess.
"Indeed it is Luna." Princess Celestia said "But as I told you from the beginning it was her destiny to do so. And Twilight proved that she is ready to handle the responsibilities."
"I understand that sister." Princess Luna said "All the same I am worried about her. Unlike Cadence she has been tempted by the powers of darkness, I'd be lying if I said I wasn't concerned that in a moment of weakness she could turn on us and destroy the very harmony we seek to maintain."
"I appreciate your concern Luna but I know Twilight better then anypony and I know that she would never give in to temptation." Princess Celestia said "And she has us and Princess Cadence to help guide her, not to mention her friends and family."
Just then one of the royal guards came bursting into the room. "Pardon my entry your majesties but something has come up."
"What sort of something?" Princess Celestia asked.
"I don't know but from what the others are saying it might be releated to Star Swirl the Bearded." the royal guard said.
"Please lead the way." Princess Celestia instructed.
"As you command." the royal guard said and promptly took off. Princess Celestia and Princess Luna followed him. The three of them arrived at the Museum of Ancient Pony History where the royal guards were blocking the entrance.
"What's this about?" Princess Luna asked.
"Someone just discovered an artifact dating back to the time period when Princess Clover ruled Equesria." a royal guard explained "The museum currator thinks it might have something to do with Star Swirl the Bearded."
"May we see the artifact?" Princess Celestia asked.
"You'll have to ask the currator herself." the royal guard who lead Celestia and Luna to the museum explained.
"Then may we enter?" Princess Celestia asked.
"Of course your highnesses." the royal guard said. He instructed the other royal guards to stand down and allow the Princesses to enter.
"Oh...uh forgive me your majesties." the currator Dusty Fossil said "I was not expecting you to visit."
"At easy Dusty." Princess Luna said "We have only come here because our royal guards believe you may have recieved an artifact from the reign of Princess Clover."
"Ah yes that item." Dusty Fossil said "Wait right here." She went into another room and returned a moment later with a letter. It had not aged well and the words printed on it could only be faintly made out.
Princess Celestia and Princess Luna read it and what they read shocked them. They had never known about this but it would certainly change Equestrian history.
"Thank you for showing us this letter Dusty." Princess Luna said "You have our deepest gratitude."
"Oh your highnesses it's nothing really." Dusty Fossil said "Please feel free to come by when this is added to our new Star Swirl the Bearded exhibit."
"We'll keep that in mind." Princess Celestia said and she and Princess Luna left the museum. Once they returned to the castle they instructed the royal guards to run a database search and find any pony whose family line could be traced back to Spectrum and Star Song.
"How could a letter that important be lost for all this time?" Princess Luna asked "I thought Princess Clover had secured everything important when she cleaned out his house?"
"Apparently she never read this letter." Princess Celestia said "She must have been distracted by her grief."
"What do we do now?" Princess Luna asked.
"For now we'll continue running Equestria like we normally do." Princess Celestia said "But we might have to make some changes based on who turns out to be releated to Star Swirl the Bearded."
A few hours later one of the royal guards entered the throne room. Princess Celestia and Princess Luna had just finished the royal court. "The results are in." he said.
"So what did you find?" Princess Celestia asked.
"According to the database search the three descendants of Spectrum and Star Song that are still alive today are Princess Twilight Sparkle, Prince Shining Armor, and a traveling mare by the name of Trixie Lulamoon.
Princess Celestia was speechless.
"Did you make sure to mark the results down as proof?" Princess Luna asked.
"Yes." the royal guard said "Should I send a message to the three informing them of this?"
"Please do so." Princess Luna said.
"Right away ma'am!" the royal guard said and he took off.
Princess Celestia was still speechless. Her former student had been a descendant of Star Swirl the Bearded the whole time and she had never known.