Heathcliff really father of Linton?
I have just read this great story, and I wonder about one question: Is Heathcliff really intended as father of Linton? My doubt results from the timeline - once Cathy says that Linton is exactly 6 months younger than her, and as far I can find out, Cathy was born about 2 months after Heathcliff took Isabella with him. There is no hint that Linton was a premature delivery (like Cathy) therefore I would expect that Linton was conceived 1 month ago. If so, only Edgar could be the father! Also Linton looked very much alike Edgar and has no similarity to Heathcliff at all. Is this some kind of a hidden clou, any idea?