Intro
This book seems to have been purposely lost by Ahmadiyya leadership.  It has many controversial stories in it.

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Tazkara-tul-Mahdi (1)

An Excerpt, taken from Upal (page 128)

One day I asked Hazrat Aqdas (as) [i.e., Mirza Ghulam Ahmad] “Hazoor, what do you say about the wahabi ghair-muqalads? Are they an impure sect? (I used to be a strongly prejudiced Hanafi back then).”

On listening to this, he smiled but stayed silent and didn’t say a word.

Next day, when I asked him again he said, “that sect is also from God and is not bad. When
people stressed taqlid and Hanafism so much that they turned the four saints into prophets then God created this sect with his wisdom so that muqallids return to the right path and become balanced.  The only thing bad about them is that each of them has become a mujtahid and an imam and started calling the four imams bad.“

I asked, “what do you think about the founder and the leader of this sect, Moulavi Nazir
Hussain?”

He said, “I have good impression of Moulavi Nazir Hussain and he is also a waliullah.”
I said that “Huzoor, I should ask for forgiveness for many bad things that I have uttered about
Nazir Hussain”…

I traveled to Qadian, I said I am coming from Qadian. He asked, “did you also meet Mirza Ghulam
Ahmad? “ I said, “Yes I just came from his place.” He said, “It’s good that you went there and met
him. He is a holy person similar to the holy people of the past”… He said, “if you go to Qadian,
then convey my salam greetings in accordance with the Sunnah of the holy prophet.” (Numani,
1915: 214-215)

Tadhkirah, 2009 edition, refers to it
If you flip to the final pages of Tadhkirah, the 2009 edition, you will some references.  See pages 1064-1067.