Lest we forget – the OED had something to say about the croak of ravens

• 15.007 I only wish he was a raven!’
• 15.009 But the ravens are different.
• 15.010 I knew many among the ravens of the rocks
• 15.013 He was an aged raven of great size.
• 15.014 Now I am the chief of the great ravens of the Mountain.
• 15.018 and listen to the raven’s news.
• 15.027 guided by a raven,
• 15.027 the ravens brought them constant tidings.
• 16.004 when the ravens brought news
• 16.045 There is news brewing that even the ravens have not heard.
• 17.044 Not even the ravens knew of their coming