Prince William gushed about his kids Prince George and Princess Charlotte. The 33-year-old royal visited Cambridge University where he studied agricultural management. The Duke of Cambridge went to St John’s College on Thursday to open a new archive centre housing historic documents.

William described his children as poles apart. He said that five-month-old Charlotte is more delicate than her two-year-old brother, George, Express UK reports. Professor Christopher Dobson, the Master of St John’s who hosted William during his visit, shared the details.

“We talked a little bit about the children and he did make a couple of comments about their different temperaments. He said George is very lively and Charlotte is very lady-like,” the professor said. Dobson added that to William, both his kids ae “delightful,” US Weekly reports.

Dobson gifted him with a children’s book for George and Charlotte. The book, titled “Fitz and Will — the Cambridge Cats,” tells the story of two cats that sneaked into a graduation ceremony at St John’s, People reports. It also has a dog that resembled the royal family’s cocker spaniel, Lupo. William jokingly told Dobson that if Lupo is actually around, there would not be any lawn left.

William had pursued a 10-week agricultural management course at the college last year to help prepare him for his future role as Prince of Wales, who is also in charge of the 135,000 acre Duchy of Cornwall estate. The college’s new archive centre is housed in a 13th century building known as the School of Pythagoras.

It contains documents dating back to the medieval era and includes a 14th century copy of the Magna Carta discovered this year. The archive is part of a £70 million (AU$ 148 million) renovation project at the college. At a brief reception, William met donors as well as those who have worked on the archive.

Dobson said that William was so impressed by the archive that he said he could spend two or three days looking at all the manuscripts and documents. The professor also presented the Duke with a navy and gold college tie. The royal said that he would wear the tie to the rugby.

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