I don't know, Wendy, but I found out this morning a particular record from a set of marriage records is also no longer available. It might be as Doug answered below, that in the case of the 1910 Census records the licensing agreement for that set of records ran out, but I found that the set of records which contained the particular marriage record I need is still on FamilySearch, I just can't find this particular record (and I searched every way I could think of to find it.) it is weird that a single record may have been removed. I left the source citation on the profile with a note about the dead link because the citation contained information which might help someone find the record in some other repository. Then I added some other sources for the same information (from Ancestry.com and a book I examined long ago in a library.) It is frustrating. I'm sure more so in your case since it involves an entire set of records.