Observeress

Meteors To-Night.—[…]There is nothing so beautiful and so well calculated to develop the (sentimental) faculties as the study of astronomy, in classes of two, of a summer’s night, so we are told, and ’tis presumable that the observers and observeresses will be numerous to-night.

Source: wiktionary

It was written with a typewriter and contains the announcement “the writer of the within is not a matinee girl, merely an observer of men and things.” It is a gamble, however, that the observer is an observeress.

Source: wiktionary

It would be hypercritical to say that Miss [Grace] Elliston overdoes the part just here. But since it is true that such a sensation can be experienced by a crucially interested observeress there must be some ground for it.

Source: wiktionary

Mrs. C. G. Fairley, a bird lover as well as an observeress of note, reports that she has seen the first robin.

Source: wiktionary