Tejada 1850 brickwall

I have been researching my family line in Zacatecas, Mainly the Tejada's who lived in Corrales,Zac.which is under the [Jiménez del Teúl,San Andrés Apóstol] records. The family lived there from 1850-1898. In many of the documents it list Antonio Tejada married to Ma.Felipa Cardenas, they must have been born in the 1820's and married in the early 1840's.. but the earlies information in this area begin at 1861. No info is given durring the 1840's or 1850's that would let me continue to find them or thier parents. It is posible that they came from JEREZ but here also is a gap in the 40's and 50's birth records. Any suggestions let me know Thanks.