Well, the sheet music was for sale on eBay, but not no longer. Nonetheless, I got a complete stanza from the eBay page:
You waltz with me at night in my dreams,
You're in my arms so tight and it seems
The stars assemble and see you tremble.
The night is still - oh what a thrill -
Your shy lips sigh like violins
The recordings I've found are instrumentals - no lyrics.
There are YouTube recordings of "Zwei Herzen" here (click) and here (click) and (most notably) here (click), but I can't make out the lyrics well enough to do a transcription.
There's information (in German) about Stolz and "3/4" here. Stolz was born in August, 1880, the 12th child of the Graz (Austria) City Music Director. He was in Berlin from 1924-1936. In 1930, he did the music for the first European sound musical film, "Three Hearts in 3/4 Time (the Lost Waltzes)." He died during a visit to Berlin in 1975.
Can somebody post both the English and German lyrics?-Joe-