{

        for (int i = you.beheld_by.size() - 1; i >= 0; i--)
        {
            const monsters* mon = &menv[you.beheld_by[i]];
            const coord_def pos = mon->pos();
            int walls = num_feats_between(you.x_pos, you.y_pos,
                                          pos.x, pos.y, DNGN_UNSEEN,
                                          DNGN_MAXWALL);
            if (walls > 0)
            {
                update_beholders(mon, true);
                if (you.beheld_by.empty())
                {
                    you.duration[DUR_BEHELD] = 0;
                    break;
                }
                continue;
            }
        }
    }

void check_beholders();

void check_beholders()
{
    for (int i = you.beheld_by.size() - 1; i >= 0; i--)
    {
        const monsters* mon = &menv[you.beheld_by[i]];
        if (!mon->alive() || mon->type != MONS_MERMAID)
        {
#if DEBUG
            if (!mon->alive())
                mpr("Dead mermaid still beholding?", MSGCH_DIAGNOSTICS);
            else if (mon->type != MONS_MERMAID)
                mprf(MSGCH_DIAGNOSTICS, "Non-mermaid '%s' beholding?",
                     mon->name(DESC_PLAIN, true).c_str());
#endif
            you.beheld_by.erase(you.beheld_by.begin() + i);
            if (you.beheld_by.empty())
            {
                mpr("You are no longer entranced.", MSGCH_RECOVERY);
                you.duration[DUR_BEHELD] = 0;
                break;
            }
            continue;
        }
        const coord_def pos = mon->pos();
        int walls = num_feats_between(you.x_pos, you.y_pos,
                                      pos.x, pos.y, DNGN_UNSEEN,
                                      DNGN_MAXWALL);
        if (walls > 0)
        {
#if DEBUG
            mprf(MSGCH_DIAGNOSTICS, "%d walls between beholding '%s' "
                 "and player", walls, mon->name(DESC_PLAIN, true).c_str());
#endif
            you.beheld_by.erase(you.beheld_by.begin() + i);
            if (you.beheld_by.empty())
            {
                mpr("You are no longer entranced.", MSGCH_RECOVERY);
                you.duration[DUR_BEHELD] = 0;
                break;
            }
            continue;
        }
    }
    if (you.duration[DUR_BEHELD] > 0 && you.beheld_by.empty())
    {
#if DEBUG
        mpr("Beheld with no mermaids left?", MSGCH_DIAGNOSTICS);
#endif
        mpr("You are no longer entranced.", MSGCH_RECOVERY);
        you.duration[DUR_BEHELD] = 0;
    }
}

    // Even if the monster transforms from one type that can behold the
    // player into a different type which can also behold the player,
    // the polymoprh disrupts the beholding process.  Do this before
    // changing monster->type, since unbeholding can only happen while
    // monster is still a mermaid.
    update_beholders(monster, true);

    check_beholders();

static bool stairs_check_beheld()
{
    if (you.duration[DUR_BEHELD] && !you.duration[DUR_CONF])
    {
        mprf("You cannot move away from %s!",
             menv[you.beheld_by[0]].name(DESC_NOCAP_THE, true).c_str());
        return true;
    }
    return false;
}

    if (stairs_check_beheld())
        return;

    if (stairs_check_beheld())
        return;

             coord_def pos = menv[you.beheld_by[i]].pos();

             monsters* mon = &menv[you.beheld_by[i]];
             coord_def pos = mon->pos();

             int newdist = distance(you.x_pos + move_x, you.y_pos + move_y, pos.x, pos.y);
             

             int newdist = distance(you.x_pos + move_x, you.y_pos + move_y,
                                    pos.x, pos.y);

                      (menv[you.beheld_by[i]]).name(DESC_NOCAP_THE, true).c_str());

                      mon->name(DESC_NOCAP_THE, true).c_str());