From the warped mind that brought you "The Halloween Chronology" comes..

...THE UNIVERSAL MONSTER CHONOLOGY

1878: Dr. Heinrich Frankenstein, heir to the Barony of Frankenstein, becomes engaged to an Englishwoman named Elizabeth (who affectionately insists on calling him "Henry").

1880: While conducting radical experiments in electrochemistry, Heinrich discovers an energy frequency higher than the ultra-violet ray. Carried within lightning bolts, this energy turns out to have amazing life-giving properties! Prompting him and his hunchbacked servant, Fritz, into using stolen cadavers to piece together an artificial body they can bring to life on their own.

1881: Occurrence of the events depicted in the 1931 FRANKENSTEIN.
1882: Occurrence of the events depicted in THE BRIDE OF FRANKENSTEIN.
1883: Heinrich and Elizabeth become the parents of fraternal twins; the brothers Wolf and Ludwig.

1898: Sir John Talbot of Llanwelly, Wales, becomes the father of identical twins (John, Jr. and Lawrence).

1904: Wolf and Ludwig Frankenstein emigrate. The former; to attend college in America. The latter; to do likewise in the neighboring province of Visaria.

1909: Ludwig marries first. Taking, as his wife, the daughter of the burgomeister of Visaria's namesake capital.
1910: Ludwig's daughter Elsa is born. Meanwhile, in America, her Uncle Wolf achieves his doctorate.
1913: Her father finally achieves his own doctorate.
1914: World War I breaks out. With Ludwig serving in the German army as a medical officer.
1918: Wolf Frankenstein becomes an American citizen by marriage.
1919: His son Peter is born. Meanwhile, Larry Talbot begins attending college in America.

1920: Ludwig Frankenstein returns to Visaria, where he founds a psychiatric hospital to aid emotionally disturbed German veterans of the war.

1921: Baroness Elizabeth von Frankenstein dies of old age. Shortly afterward, the townspeople catch an immigrant shepherd named Ygor in the act of trying to rob her grave! The latter was secretly hired to do so by Dr. Gustave Niemann (the local physician's new assistant). Ygor is subsequently lynched and officially pronounced dead. But, in reality, he was merely put into a drug-induced coma by Niemann! Thereby insuring Ygor's undisturbed revival, later on, in the mortuary (from which he easily escapes into the surrounding countryside). It's while he is hiding out in a certain cave, near the ruins of Baron Heinrich's old laboratory, that Ygor finds the comatose body of the Frankenstein Monster.

1922: The elderly Baron Heinrich is now so invalid and despondent that he requires a full-time caretaker. So, Dr. Niemann engineers the hiring of his own brother for that position. In this manner, the absent-minded baron is easily manipulated into revealing some of his old scientific secrets...which his caretaker then relays to Niemann.

1923: Baron Heinrich dies of old age. Prompting the notification-by-telegram of his son Wolf (the first-born twin).

1924: Occurrence of the events depicted in SON OF FRANKENSTEIN.
1925: Occurrence of the events depicted in GHOST OF FRANKENSTEIN.
1928: While helping to custom-make telescopic lenses for a certain observatory, in California, Larry Talbot learns about the untimely death of his twin brother. Not knowing, of course, that John Jr. was secretly vampirized by that love-lorn dhampir...Countess Marya Zaleska.

1929: Occurrence of the events depicted in THE WOLF MAN.

1932: The local police of Frankenstein catch Dr. Niemann in the act of conducting illegal experiments in trans-specific brain transplantation. Experiments that had been secretly funded by the pro-Nazi Thule Society! He is subsequently arrested, tried, and sentenced to life-without-parole in Neustadt Prison.

1933: Occurrence of the events depicted in FRANKENSTEIN VS. THE WOLF MAN.
(Note: it is during this same year that the Nazi Party takes power in Germany.)

1935: Occurrence of the events depicted in DRACULA'S DAUGHTER.
1936: While attending one of the night-time events, at the Summer Olympics in Berlin, John Talbot, Junior meets a vacationing American Southern belle named Katherine Caldwell. The latter--an overzealous student of the occult (from her late mother's former membership in the Spiritualist Church of America)--soon recognizes the so-called "Count Alucard" for who and what he really is.

1937: After a year-long courtship, Katherine and "Alucard" get married. He, in order to obtain American citizenship. She, in order to obtain vampiric immortality for herself and her true love, Frank Stanley.

1938: Occurrence of the events depicted in SON OF DRACULA.
1939: The Nazis invade Poland; thereby starting WWII.
(Note: this is the main reason that Katherine Caldwell could not have been vacationing in Europe circa 1943!)

1945: World War II ends.
1946: Occurrence of the events depicted in HOUSE OF FRANKENSTEIN.
(Note: there are many theories as to why Ilonka the Gypsy girl's silver bullet failed to kill the revivified Larry Talbot. One theory postulates that the bullet was made from something that had merely been silver-plated. Another postulates that a greater part of her still wanted him to live. Hence; her heart was not completely set on putting him out of his misery. The harshest theory of all, though, has to be that what she felt for Talbot wasn't really true love. Rather, just glorified infatuation!)

1947: Geneticist Dr. Sandra Moreau--grandniece of the infamous French vivisectionist--assumes the surname of "Mornay" in order to flee Europe (where she is wanted as a Nazi-collaborating war criminal). Along the way, she encounters a Romanian refugee named Dr. Lajos...who is actually the reanimated Count Dracula! Larry Talbot discovers this while bounty-hunting the woman, on behalf of Interpol, and has an epiphany. Perhaps _this_ is why Ilonka's silver bullet failed to kill him.

1948: Occurrence of the events depicted in ABBOTT & COSTELLO MEET FRANKENSTEIN.