Federico Ruiz, que tuvo años ha la manía de escribir artículos sobre los _Oscuros pero indudables vestigios de la raza israelita en la moderna España_ (con los cuales artículos le hicieron un folletito los editores de la Revista que los publicó gratis),.
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Years ago, Federico Ruiz, had a penchant for writing articles on the 'obscure yet undeniable vestiges of the Israelite race in modern Spain'—articles which the publishers of the Revista, the journal that printed them— compiled into a small booklet for him, free of charge.
Translated by markvanroode 10685 2 days, 11 hours ago
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Federico Ruiz, who years ago had a penchant for writing articles on the 'obscure yet undeniable vestiges of the Israelite race in modern Spain'—articles which the publishers of the Revista, the journal that printed them— compiled into a small booklet for him, free of charge.
Translated by markvanroode 10685 2 days, 13 hours ago

Discussion

If you want a . at the end here:
Federico Ruiz, years ago, had a penchant ... / Years ago, F. ...
Otherwise there is no verb to go with the name of that man. => no clause.

by marina 2 days, 12 hours ago