I think the rosary is a beautiful devotion, designed to lead us to Jesus in an intimate way, deeper than anti-Catholics can comprehend. It is also a good bible study because it places you in the major events of the Bible. It's called contemplation. But you are throwing pearls before swine with an opening post on the rosary. It was given to St. Dominic to convert the Albigensians. That might be a good place to start, since Baptist Successionists claim them as their spiritual forefathers, the oppressed "remnant".
It is true that SOME baptist claim lineage going way back... but not to people so much as a direct link to the New Testament churches going through all generations.
Now this link.. cannot be completely perfectly traced because A LOT of these christians with baptist (more like independent baptist) beliefs were CUT OFF WITH THE KNIFE. Millions of them!
The booklet The Trail of Blood booklet is a summary of this. The Battle for Baptist history gives more detail on this.
It is real history. If God promised He would have His churches through all generations.. and Catholics had incorporated infant baptism.. salvation by works.. worship of mary and the saints..
Then it has logically got to be independent christians who weren't catholic.
Now.. there were groups that got lumped with the baptist name.. which actually as you say.. were not really seperated from Catholicism..
But the true groups that claim the lineage going right back:
* Are distinctive by sticking to the likes of
*only baptising adults after they have professed salvation,
*belief in the bible as the sole authority on matters of faith,
*re-baptism of adults who have been in catholicism or another erring teaching
*autonomy and independence of the local assembly
*Lord's Supper as a practice for the members of that local assembly only
*Tithing to a local assembly
They were given nicknames.. and persecuted to the maximum.. but have remained. They weren't reformers.. they weren't catholics.
Another book: Churches in the Valley of Piedemont.. will show this. It is written by someone who wasn't an inherent of these teachings.. but shows a lot of the real history. Persecuted christians living around some valleys of mountains who kept to the above teachings, existing well before the reformation and never catholic.
Churches that adhere to these teaching exist now.. many have the name bible baptist, independent missionary baptist or independent baptist, landmark baptist .. others may have no denominational name but stick to the teaching above.
St Dominic may have been commissioned to 'convert' them when going back in history.. but which group was actually sticking to biblical teaching? Those who sent St Dominic.. or the group who were supposed to be converted?
Also- what was the 'conversion'? Join the Roman Catholic church or be killed?
And as for studying the bible.. the rosary is no where in it.
If this post is pretty pointed. . it is because these baptist you mention.. have a history of incredible persecution.. and my own church has the same teaching of these persecuted churches.