A writer can start by doing in - depth research. This means reading primary sources like diaries, letters, and official documents related to the event or person. For example, if writing about a historical figure, study historical records. Also, interviewing people who were involved or have knowledge of the situation can add authenticity.
To ensure authenticity, a writer should get the timeline right. Make sure that events are presented in the correct order as they occurred in real life. They can also use dialogue sparingly but accurately. If there are records of what was actually said, use those words. Another aspect is to not project modern values or ideas onto the past or the people in the story. Try to understand the context of the time and place where the true story took place. For example, if writing about a story from the 19th century, don't make the characters think and act like modern - day people. This helps to keep the integrity of the true story.
One important thing is to stay true to the facts. Don't exaggerate or change key elements just for the sake of making the story more exciting. For instance, if it was a small - scale event, don't turn it into a huge, over - the - top drama. Use real - life details. If there was a particular place where the event happened, describe it accurately. Writers should also be aware of different perspectives. There may be multiple views on what happened, so try to incorporate as many as possible in a balanced way. This can involve talking to different witnesses or researching different accounts.