Quick Archival Research Links
(many more on main Archival Links page)
Archival Searches:
Portal de Archivos Españoles (PARES) (AGI, AHN, and other Spanish archives; images and/or text descriptions)
Archivo General de la Nación (Mexico City; text descriptions w/some images)
Archivo General de Notarías de la Ciudad de Mexico (Mexico City; transcriptions w/o images)
Google Books ( Free ( Pre-1700 / Pre-1830 ( Spanish / French / English )))
Internet Archive (includes Google Books and other historical books online)
Archivos Históricos de la Diputación Foral de Gipuzkoa (search page)
Archivos de Euskadi (search page)
Spanish Translation:
SpanishDict (modern Spanish-English)
Real Academia Española (modern Spanish-Spanish)
Nuevo Tesoro Lexográfico de la Lengua Española (many historical Spanish dictionaries; image results)
Diccionario de Autoridades (1726-1739 dictionary only; text results)
JW Pages
Colonial-Era Language Resources (Google Books scans of many historical dictionaries, many languages)
Tables of Spanish Colonial Weights and Measures