How many plays were written by English writer Robert Browning, and with what names?I 've come to know about 8 plays of him, while some sources deny...

Here are the names of the plays written by Robert Browning
that I was able to find:

1. "Strafford"
(1837)

2. "Pipa Passes" (1841- Published in Bells
and Pomegranates, No. I)

3.
"King Victor and King Charles" (1842- Published in Bells and
Pomegranates, No. II)

4. "The Return of the
Druses" (1843-Published in Bells and Pomegranates, No.
IV)

5. "A Blot in the 'Suctcheon" (1894- Published in
Bells and Pomegranates, No. V)

6.
"Colombe's Birthday" (1844- Published in Bells and Pomegranates,
No. VI)

7. "A Souls Tragedy" (1846- Published in
Bells and Pomegranates, No. VIII)

8.
"Luria" (1846- Published in Bells and Pomegranates, No.
VIII)

9."In a Balcony" (1868/9) Could be considered a poem
or play given its distinctive dialogue.

I could only find
these 9. From what I found out about "In a Balcony" there could be another of Browning's
poems which one could interpret as either a poem or a play.