牛津大學真的發生過更換350年橡木橫樑的事件嗎？

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有一年，英國牛津大學發現，有著350年歷史的學校大禮堂的橫樑已經風乾朽化，必須得更換。這二十根橫樑由巨大的橡木製成，可到哪裡去找長得一般粗壯的橡樹，來保持這所有著幾百年歷史的大禮堂的原有風貌？學校園藝師向校方報告，當年的設計師已經預想到這種情況，所以早在校內一塊土地上安排種植了大片橡樹林。在一代代園藝師的守護下，現在，每棵橡樹的尺寸都超過了橫樑所需。大禮堂的橫樑問題，可以圓滿解決了。

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The anthropologist/philosopher Gregory Bateson used to tell this story:

Founded in 1379, New College, Oxford is one of the oldest Oxford colleges. It has, like other colleges, a great dining hall with huge oak beams across the top, as large as two feet square, and forty-five feet long each.

A century ago, some busy entomologist went up into the roof of the dining hall with a penknife and poked at the beams and found that they were full of beetles. This was reported to the College Council, which met the news with some dismay, beams this large were now very hard, if not impossible to come by. "Where would they get beams of that caliber?" they worried.

One of the Junior Fellows stuck his neck out and suggested that there might be some worthy oaks on the College lands. These colleges are endowed with pieces of land scattered across the country which are run by a college Forester. They called in the College Forester, who of course had not been near the college itself for some years, and asked him if there were any oaks for possible use.

He pulled his forelock and said, 「Well sirs, we was wonderin』 when you』d be askin』.」

Upon further inquiry it was discovered that when the College was founded, a grove of oaks had been planted to replace the beams in the dining hall when they became beetly, because oak beams always become beetly in the end. This plan had been passed down from one Forester to the next for over five hundred years saying 「You don』t cut them oaks. Them』s for the College Hall.」

A nice story, one which raises an immediate question, 「What about the next time? Has a new grove of oaks been planted and protected?」

The answer to this is both yes and no. The truth of the story, is that there was probably no single patch of trees assigned to the beams. It was standard practice for the Foresters to plant oaks, hazel, and ash. While they would harvest the Hazel and Ash every twenty years or so, they allowed the oaks to grow quite large for use in major construction work. (The oaks were also occasionally used in ship building.)

Additionally, the trees from which the oaks used to rebuild the hall came from land that was not acquired by the college until 1441, nearly sixty years after the hall was originally built, and the roof of the hall had already rebuilt once before in 1786 using pitch pine timbers, because the large oak timber was apparently unavailable.

The answer to the question, have new oaks been planted, is probably. Somewhere on the land owned by the New College are oaks that are, or will one day, be worthy of use in the great hall, assuming that they are managed in the same way they were before. It is in this management by the Forester in which lies the point. Ultimately, while the story is perhaps apocryphal, the idea of replacing and managing resources for the future, and the lesson in long term thinking is not.