There is only one thing wanting,’ said Amy. ‘You may sing now. You are far from Philip’s hearing. Suppose we chant this afternoon’s psalms.’
It was the fifth day of the month, and the psalms seemed especially suitable to their thoughts. Before the 29th was finished, it was beginning to grow dark. There were a few pale flashes of lightning in the mountains, and at the words ‘The voice of the Lord shaketh the wilderness,’ a low but solemn peal of thunder came as an accompaniment.
‘The Lord shall give his people the blessing of peace.’
The full sweet melody died away, but the echo caught it up and answered like the chant of a spirit in the distance—‘The blessing of peace.’
The effect was too solemn and mysterious to be disturbed by word or remark. Guy drew her arm into his, and they turned homewards.
The passage's allusion is to the 30-day scheme for praying through the Psalms in the Prayer Book, which prescribes Psalms 27-29 on the fifth of every month. Many Christians have followed this pattern for generations, and I highly recommend it to readers of this blog. There is no substitute for the biblical Psalter in our daily prayers.