- Series: Letters to Otis Adelbert Kline Series Record # 33440
- Sub-series of: Letters from Robert E. Howard
- Letters to Otis Adelbert Kline
- Letter to Otis Adelbert Kline, May 13, 1935 ("Dear Kline: / I'm writing this to ask for some...") (2007) [ES] by Robert E. Howard also appeared as:
- Letter to Otis Adelbert Kline, January 8, 1936 ("Dear Kline: / A belated acknowledgment of the check...") (2007) [ES] by Robert E. Howard also appeared as:
- Letter to Otis Adelbert Kline, January 13, 1936 ("Dear Kline: / Just read yours of the 11th...") (2007) [ES] by Robert E. Howard also appeared as:
- Letter to Otis Adelbert Kline, January 18, 1936 ("Dear Kline: / Just read your letter of the 15th...") (2007) [ES] by Robert E. Howard also appeared as: