Possible Clues:

• 'Shipwrecked, were almost all accommodated,' you murmur
• Speak covertly
• Talk quietly
• Speak or utter very softly
• Talk in a low voice
• Rumour saw his person­al stock diminished
• Women's Institute's admitting husband according to rumour
• Pass along softly, as a secret
• A secret may be told in one
• Speak softly