I wanted to post a reference from the writings of Mahmud Ahmad in 1915 as he argued that MGA was in fact a prophet, however, without law.
“At last that event did take place. In the year 1900, Maulavi ‘Abdul Karim, the preacher of the Friday sermon, gave a sermon in which he, used the words Nabi (Prophet) and Rasul (Messenger) for the Mirza. This caused great irritation to Maulavi Sayyid Muhammad Ahsan Amrohawi. When Maulavi ‘Abdul Karim came to know of this, he gave another Friday sermon in which be addressed the Mirza, requesting him to contradict his belief, if he was wrong in considering him to be a prophet and Messenger of God. After the Friday prayers were over, Maulavi ‘Abdul Karim caught hold of the skirt of the Mirza’s apparel and requested him to correct him in his beliefs if they were erroneous. The Mirza turned around and said that he, too, held the same belief. Meanwhile, Maulavi Muhammad Ahsan had been greatly agitated by the sermon and in anger was pacing the floor of the mosque. On Maulavi ‘Abdul Karim’s return, he began to quarrel with him. When their voices rose very high, the Mirza came out of his house and recited the Qur’anic verse: “O ye who believe! Don’t raise your Voice above the voice of the Prophet.”
(This event is based on the report of a speech of Sayyid Sarwar Shah Qadiani at an annual conference held in Qadian, and published in al- Fadhl, Vol. X, No. 51, dated january.4,1923)
(See also Haqiqat al- Nubuwat, p 124.[published in 1915])
MGA had multiple ghost-writers. In this case, Maulvi Amrohi (who was the first payed Ahmadi-mullah), he didn’t know that MGA had finally claimed prophethood and Maulvi Abdul Kareem was ordered to pronounce it. They proceeded to argue, then MGA quoted the Quran and thus claimed prophethood openly for the first time (summer 1900). However, he remained silent for an additional 1 1/2 years or roughly 14+ months.
Later on, after “Correction of an Error” was published, Maulvi Amrohi wrote a rebuttal to an inquiring mind who accused MGA of claiming prophethood, however, Maulvi Amrohi very tactfully only denied independent prophethood, he never even mentioned the “The Ummati-Nabi”. Fast forward to 1914, Maulvi Amrohi nominated Mahmud Ahmad as Khalifa and sided with him in his first year of his Khilafat. He even read Mahmud Ahmad’s 2 books on the subject of prophethood, i.e. Qaul al Fasl and Haqiqatun Nubuwwat, however, in the summer of 1915, he seems to have had a change of heart and denounced MGA’s claim of prophethood and deposed Mahmud Ahmad as Khalifa. He then sided with the Lahori-Ahmadis and died in 1919 in this state.