"and only subsequently" is correct and usable in written English.
You can use it when you want to explain that something happened after a separate event. For example: "I was not able to complete the project in time, and only subsequently was I able to finish it."
I identify widely shared attitudinal patterns among a pooled sample of over 27,000 respondents from thirty countries and only subsequently examine those respondents' national affiliations.
In some cases the viral genetic material may integrate into the host genome and only subsequently, under particular circumstances, 'complete' its life cycle.
In profiles, much was made of Yorke's childhood difficulties, the fact that he was born with one eye fixed shut and only subsequently half-opened by a series of failed operations.
At the time of its release, Roger Angell reviewed it in the magazine (the article is available here to subscribers), and reported that Handke conceived the story as a film and only subsequently wrote it as a novella.
A dreary contemporary philistinism, wanting to reduce the works to the life, insists that Britten has to be considered first of all as a lover and idealiser of young boys and only subsequently as a major artist.
These phenomena seem to be due to significant transformations among the alloy phases and corrosion products, which seem to start with zinc consumption of the electrogalvanized steel surface and, only subsequently, of the galvanneal surface.
Our ferrets were trained on the procedural aspects of the lateralization task using broadband noise, and were only subsequently tested with pure tones.
Anecdotal evidence suggests that there may have been a long-standing pattern where couples who are engaged to be married, move in with one set of their parents and then marry only subsequently, when this fits the family economy and other practical circumstances (observation by Kostova 2007).
Of note, the history of ajmaline administration had not been volunteered by the patient prior to the liver biopsy, and only emerged subsequently after liaison between the patient's hepatologists and his family physician.
Psychology was better off autonomous, discovering empirically new laws and phenomena that only subsequently might or might not prove reducible to material interpretation.
We could always go back to the next film, and it's only subsequently since that I realized what a big thing it is.
