\&
.ft HB
.ps 48
.vs 50
\H'48'
PAGE 1
.bp
PAGE 2
.bp
.\"void                                                     \" correcting effect
.PS
line invis up 1 "PAGE 3\[:u]" aligned above              # fails
#line invis up 1 "PAGE 1" aligned above                   # ok
.PE
.bp
PAGE 4
.br