My compliments to your wife and my heart to you.

He was still in contact with the Parisian literary/artistic circles, mostly through letters. Very modest, he encouraged a lot of young poets with esoteric advice.

Your fault, my dear Charles, is a lack of depth. Cocteau used to say that Apollinaire had a fat drop of glory at the end of his quill. Do you understand?...
How does one get depth? you ask me (...). One has to think of his poem, stanza or verse for a long time. You have to "bear" it a long time before writing it. And, to avoid a pregnancy with contrary effects (meaning too much individual snail and obscurity), pick strong and flashy words, which make for strong images. This way, you'll get depth and strength. You often have to call on your guts, your good sense, the [kitchen]stove - it gives depth. You have to understand yourself well, even in the mystery, the great mystery. Even in inspiration, it requires survival.

Friendship heartbreak might be the worst.