Researchers from Royal Mail in the UK along with Tracey Trussell, a leading handwriting analyst studied letters and notes from UK's defining figures such as Rosalind Franklin, Isaac Newton, Queen Victoria, Florence Nightingale, Millicent Fawcett, Charles Darwin and Elizabeth Fry.
The subjects were chosen as they were all keen letter writers and appeared in the 100 Greatest Britons or 100 Great Black Britons lists.
"Handwriting is like 'brain writing' because it comes through the central nervous system. It's a snapshot in time," said Tracey Trussell, handwriting analyst in the UK.
Writing consists of three zones - upper, middle and lower The upper zone focuses on the parts of the letters that extend up wards like b, d, f, h and k, researchers said.
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People with a large and dominant upper zone have rich imaginations, creative mind-sets and big aspirations. They are also intellectually savvy, ethical and have high standards, like Claudia Jones, Ignatius Sancho and Charles Darwin, researchers said.
Narrow or non-existent right margin is when the end of a sentence leaves no space on the right hand side of the page. Words appear to fall off the edge of the page or dip down like in the cases of Isaac Newton and Charles Darwin.
The size of the right hand margin shows the writer's real feelings towards the future. Those that leave no right margin are outgoing and engaging. They are also impulsive, goal- orientated and driven, researchers said.
"It is amazing to think that something we do every day can reveal so much about us," said David Gold from Royal Mail - a postal and delivery provider service.
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