当然，我可以帮助你写一篇寻物启事的英文版本。下面是一个简短的例子：

Lost Item Notice

I am writing to request your assistance in locating my lost item. On the evening of [insert date], I misplaced an item that holds significant sentimental value to me. The item is a [describe the item, e.g., black leather wallet] with [mention any distinctive features, e.g., a family photo inside and a few business cards].

It was last seen at [mention the location, e.g., the third floor of the library on campus]. If anyone has found such an item or has any information leading to its recovery, please contact me at [your phone number or email address]. I would be immensely grateful for any help in this matter.

Thank you very much for your time and consideration.

Sincerely,

[Your Name]

请根据实际情况填写上述方括号中的内容。希望这可以帮助到您！如果需要进一步修改或有其他要求，请随时告诉我。