Prince Harry has accused his brother, William, of physically assaulting him during an argument over his wife, Meghan, Duchess of Sussex in 2019.

UK newspaper The Guardian claim to have seen an advance copy of Prince Harry’s highly anticipated memoir, Spare, in which Harry reportedly alleges William knocked him to the floor during the altercation.

The alleged incident took place after a conversation between the two brothers, during which William, the heir to the British throne, called Meghan Markle “difficult,” “rude” and “abrasive”.

“The confrontation escalated until William “grabbed me by the collar, ripping my necklace, and … knocked me to the floor,” The Guardian reported.

The Guardian article focuses on the alleged physical altercation between the brothers but describes the entirety of the book as a “remarkable volume.”

The article reports Harry’s version of events, in which William arrives at Harry and Meghan’s then home, Nottingham Cottage on Kensington Palace grounds, to allegedly discuss “‘the whole rolling catastrophe’ of their relationship and struggles with the press.”

Harry alleges that William attacked him after he had offered him water and attempted to cool a heated verbal exchange, according to The Guardian.

The article quotes Harry, “He set down the water, called me another name, then came at me. It all happened so fast. So very fast. He grabbed me by the collar, ripping my necklace, and he knocked me to the floor. I landed on the dog’s bowl, which cracked under my back, the pieces cutting into me. I lay there for a moment, dazed, then got to my feet and told him to get out.”

The article says Harry states in the book that William urged him to hit back, but he refused to do so. William left but later returned “looking regretful” and apologised, according to The Guardian article, quoting the book.

Spare is due to be released on January 10.

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This article first appeared on Over60.