Going straight to the source, the H.P. Lovecraft SocietyH.P. Lovecraft Society offers a number of fonts (some free, some for sale), including Lovecraft Cursive (unfortunately not part of the free set). The whole set of 50 fonts is available for $20$35.00 and contains more than 80 beautifully rendered digital props.
A quick Google search for "free handwriting fonts" finds this site: Fontspace, and the following font Signerica looks like it might meet your needs. Compile with XeLateX or LuaLateX:
\documentclass[12pt]{article} \usepackage{fontspec} \setmainfont{Signerica Medium} \begin{document} Some text written by a crazed madman. \end{document} 
Since I have no idea what an elder sign is, I guess I don't get any bonus points.