The New York Musical Academy

From John Patrick Deveney's copious notes on American Spiritualist journals, the first independent evidence found of Emma's establishment of a musical academy in the offices of the SDSK (from the June 4, 1856 issue of the SDSK's periodical, The Christian Spiritualist, which Emma claims in the Autobiography she was editing at the time.) Note the "Miss".

Miss Hardinge's Musical Academy.
It will be perceived from the subjoined proposals and accompanying statement that Miss Emma Hardinge is about to establish, at 553 Broadway, in this City, a Musical Academy, where those who are intending to pursue the study and practice of Music, may be provided with all the facilities necessary to a scientific and artistic education. We have not hitherto enjoyed the pleasure of a familiar personal acquaintance with Miss Hardinge, but after two or three brief private interviews, and a perusal of several of her contributions to the public Press, we feel assured that she is a lady of superior intelligence, and endowed with many noble and generous attributes and qualities of mind and heart.
Miss Hardinge acquired her musical education in Europe, where, as we learn, she held a professorship in a highly respectable institution. The lady has our earnest wishes for her success in the enterprise she has chosen; and we hope that those of our readers who may desire to avail themselves of such advantages as are offered by Miss Hardinge, will call at her Academy, and make themselves acquainted with her claims and qualifications, before applying for admission and instruction elsewhere.—Ed.
This Academy will open June 30, 1856, under the direction of Miss Emma Hardinge.
The object of the Institution is the promotion and cultivation of Spiritual and Classical Music of the highest order.
Instruction will be given in solo singing, concerted singing, piano forte playing, harmony composition, and elocution.
In order to render the benefits of the Academy attainable to all classes, the Principal has decided upon the following scale of Terms:
First Class—Harmony and composition . . . .$18 per Term.
Second Class—Solo Singing in the best Italian Method . . . .20 “ “
Third Class—Classical Piano Forte playing . . . . 20 “ “
Fourth Class—Elementary Instruction in Singing or Music . . . .15 “ “
Fifth Class—Concerted Music, Glees, Choruses, Part Singing, etc . . . . 15 “ “
For two Students subscribing to the fifth class together . . . . 15 “ “
The Principal earnestly desires to direct attention to the latter class, which will meet two evenings each week for the study of every kind of concerted music, from simple Glees to Oratorios. The design in forming this class is to establish an harmonious and accomplished musical association where the highest purposes of the art may be developed. Every possible assistance will be rendered to its members—instruction in sight singing given, and vocalists of all capacities admitted.
A semi-public exhibition of the Students will be given every fourth Saturday.
Each term will consist of eleven weeks, to commence from the day of entry. All payments to be made in advance.
Elocution taught in class at . . . .$20 per Term.
Private lessons at . . . . 15 per course of twelve lessons.
The Principal will be ready to receive applications at the Academy every day from 11 A.M. till 1 P.M.

From Pat's notes, it is clear that Emma is trying hard to make her career as a musician and music teacher go during this period, digging deep for material, including (as advertised in February of 1857) rehashing her part in the 1844 Sadler's Wells production of Macbeth by staging the witches' scenes and music from Macbeth.