reply in writing

I would request a reply in writing.

Mr. Clinton, who said on Tuesday that Mr. Weld was "entitled" to a hearing, did not reply in writing.

Mrs in 't Velt has asked some complicated questions, seventeen in all, to which we shall naturally reply in writing: they are very technical questions, but important.

With the help of poet and fellow expatriate W.H. Auden, Britten replied in writing, "in as dignified a manner as possible", that his supplying a Christian work was no surprise, as he was a Christian and came from a Christian nation.