The Adventures of Nero Wolfe
Here is a sample of the online episodes currently available at The Old Time Radio Fan:
Stamped for Murder
1950-10-20 (6.68 MB) [29:12]
The Final Page
1951-03-23 (13.39 MB) [29:15]
The Tell-Tale Ribbon
1951-03-30 (13.32 MB) [29:05]
The Lost Heir
1951-04-20 (13.4 MB) [29:17]