altar - not alter.
I noticed that the original web page had it wrong, too.
An alter call might be an invitation to become a gelding.
Man, after formatting all that stuff, linking the page and posting the picture, I confess that I failed to proofread the copy.
Mea culpa, mea culpa, mea maxima culpa!
(pppppbbbbbbbbbbttttttttttt! ;-) )