It was 1658. Agnes Bowker, 27, daughter of the late Henry Bowker of Harborough, Leicestershire, a spinster and domestic servant in the same town, found herself with a difficult, but hardly unusual problem - she was pregnant.

Cast out by her employer when her predicament became evident, she seems to have wandered the countryside until on the 16th of January the following year she gave birth, after an apparent gestational period of 53 weeks, with in attendance a midwife and several "gossips" (female matrons).

This, however, is where the story gets very strange indeed. For she gave birth, it seemed, to a "monster", as she called it, or what was clearly a cat, as forensic examiners saw it.

Based on her later testimony, the father might have been another servant, Randal Dowley, who suspiciously fled the area and was never heard from again, it might have been an apparently shape-shifting beast that assumed the form of a cat, a bear or a man, or a sinister schoolmaster, Hugh Brady.

It seems pretty clear, to me anyway, that she was covering up either a late abortion or infanticide. Panic-stricken, she doesn't seem to have thought that this was not a way of quietly covering up what she had done.

That, tragically, in 2005, some girls or women should still find themselves in the same situation is evidenced by the recent discovery of a baby's body on Teeside. I heard on a radio that a girl, 15, had come forward.

But anyway, back to the history - Agnes's tactic eventually worked, in that she escaped punishment - which could have been the rope for infanticide - and disappeared back into history.

One of the remarkable things about this case, and there are many, is the way the local official charged with investigating the case, Anthony Anderson, went about his work.

His is the drawing of the "monster" on my blog, done with meticulous forensic care. "This picture ... containeth the full length, thickness and bigness of the same, measured by a pair of compasses."

The townsfolk had already dissected it, and found a piece of bacon in its throat that obvious convinced most of the men that this was just a piece of trickery.

Now the official charged that another cat be killed and flayed, so that its shape could be compared to the "baby". He found the only difference was in the colour of the eyes. "I cast my flayn cat into boiling water, and pulling the same out again, both in eye and else they were altogether one." (p. 21)