Neil sent him a letter of condolence.

尼尔给他发了一封吊唁信。

《柯林斯英汉双解大词典》

Mr Brown had contacted Mrs Janes to apologise about a letter of condolence which contained a series of errors.

布朗先生曾经和琼斯夫人接触，为一封错误百出的吊唁信表示道歉。

youdao

Mr Brown had earlier misspelt her surname in a letter of condolence.

此前，布朗先生曾在悼词中拼错了这位母亲的姓。

youdao

The mother of a dead British soldier has called Gordon Brown's letter of condolence to her "disrespectful", partly because of his handwriting.

BBC: How does Brown's handwriting compare with other PMs'?

As President, I have signed a letter of condolence to the family of each American who gives their life in these wars.

WHITEHOUSE: President Obama on the Way Forward in Afghanistan and Pakistan | The White House

What about the families of military personnel who take their own lives -- does the President believe that those families deserve a letter of condolence as well?

WHITEHOUSE: Press Briefing