The Source Directory Starting a Rehabilitation Project? HYI produces The Source Directory ever two years, which lists professionals, contractors, craftspeople, and materials suppliers who specialize in older and historic homes. Call or e-mail us for your copy! Downloadable PDF format coming soon.   What Style is My House? An easy-to- follow chart to help you identify the Architectural Style of your house is coming in June 2004.   Reference Library HYI maintains a library of reference books to guide you in the restoration of your historic home.   Historic House Calls HYI professional staff will visit your home to help assess its architectural features and guide you on your rehabilitation/restoration project. Cost: $45/hour Call to make an appointment!