Thanks again for your answer!

I would like to find all Endnotes, they are numbered (1,2,3....1000) and then taking
each endnote and do this:

case Endnote 1:
replace the whole Endnote 1 in the word text by this:
<a id="bn_1" href="../Text/footnotes.html#n_1">1</a>

case Endnote 2:
replace the whole Endnote 2 in the word text by this:
<a id="bn_2" href="../Text/footnotes.html#n_2">2</a>

I would appreciate any further help greatly, thank you, kindest blessings