Sub Articulo 64.0
I have used dropping.sty it with yinitas. It may not be the best
solution, but I simply defined a new command in the preamble with the
following:
\newcommand{\yinit}{\usefont{U}{yinitas}{m}{n}}
This assumes that you have a file uyinitas.fd somewhere, I essentially
copied a file called uyinit.fd that I had from another source. There
may be a suitable .fd file somewhere on CTAN, or you can roll your own.
I then used commands such as the following when I wanted a dropped
capital. This worked sufficiently well for my purpose.
\dropping{3}{\yinit{} T}his