vsize j = binary_search (cols, other, Paper_column::less_than, col_index);
if (j != VPOS)
{
if (cols[j] == other)
description.rods_.push_back (Rod_description (j, scm_to_double (scm_cdar (s))));
else /* it must end at the LEFT prebroken_piece */
vsize j = binary_search (cols, other, Paper_column::less_than, col_index);
if (j != VPOS)
{
if (cols[j] == other)
description.rods_.push_back (Rod_description (j, scm_to_double (scm_cdar (s))));
else /* it must end at the LEFT prebroken_piece */