int ystart = you.y_pos - 9, xstart = you.x_pos - 9;
    int yend = you.y_pos + 9, xend = you.x_pos + 9;
    if ( xstart < 0 ) xstart = 0;
    if ( ystart < 0 ) ystart = 0;
    if ( xend >= GXM ) xend = GXM - 1;
    if ( yend >= GYM ) yend = GYM - 1;

    for (int y = ystart; y <= yend; ++y)
        for (int x = xstart; x <= xend; ++x)
            if (see_grid(x,y))

    for (radius_iterator ri(you.pos(), LOS_RADIUS); ri; ++ri )
    {
        if ( mgrd(*ri) != NON_MONSTER )
        {
            const monsters *mon = &menv[mgrd(*ri)];
            if (player_monster_visible(mon)
                && !mons_is_submerged(mon)
                && (!mons_is_mimic(mon->type)
                    || testbits(mon->flags, MF_KNOWN_MIMIC)))

                const unsigned short targ_monst = mgrd[x][y];
                if (targ_monst != NON_MONSTER)
                {
                    const monsters *mon = &menv[targ_monst];
                    if (player_monster_visible(mon)
                        && !mons_is_submerged(mon)
                        && (!mons_is_mimic(mon->type)
                            || testbits(mon->flags, MF_KNOWN_MIMIC)))
                    {
                        mons.push_back(mon);
                    }
                }

                mons.push_back(mon);

        }
    }