Meanings of enthusiastic letters in English

Few visitors called; but enthusiastic letters have begun to come in.

Moreover, he had written the most enthusiastic letters in appreciation of my pamphlets, Das Kunstwerk der Zukunft and Oper und Drama.

Afterwards, Camillo confessed to himself that Villela's wife did not at all belie the enthusiastic letters her husband had written to him.

It was only after a moment that he remembered that it was where old Schulz lived, who had written him such kind and enthusiastic letters.

He did not talk about her much himself, but his eyes sparkled when I told him what enthusiastic letters Polly and Elizabeth wrote about her.

His friends contracted the mining mania; Bob Howland and Raish Phillips went down to Aurora and acquired "feet" in mini-claims and wrote him enthusiastic letters.