Stretched high-spin two-neutron-hole states in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi mathvariant="normal">Pb</mml:mi></mml:mrow><mml:mprescripts /><mml:mrow /><mml:mrow><mml:mn>206</mml:mn></mml:mrow><mml:mrow /><mml:mrow /></mml:mmultiscripts></mml:mrow></mml:math>and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi mathvariant="normal">Sn</…

Two-neutron-hole excitations have been investigated via the (p,t) reaction at 168 MeV on $^{208}\mathrm{Pb}$ and $^{116}\mathrm{Sn}$ targets, up to \ensuremath{\sim}25 and \ensuremath{\sim}17 MeV excitation energy, respectively. The kinematic conditions strongly favor high L transfer values (L\ensuremath{\sim}10 for Sn and L\ensuremath{\sim}13 for Pb). High-spin stretched states are found to dominate the spectra with an even stronger enhancement for J=[(${l}_{1}$+(1/2)(${l}_{2}$-1) states. Angular distributions and standard local zero-range distorted-wave Born approximation analysis have been performed for $^{206}\mathrm{Pb}$. Such analysis has been extended to the $^{114}\mathrm{Sn}$ data taken at two angles. The zero-range normalization constant ${D}_{0}^{2}$ is found to be significantly smaller than that usually adopted at low incident energy, ${D}_{0}^{2}$\ensuremath{\sim}6 instead of \ensuremath{\sim}22. The high-spin stretched states of the valence multiplets are distributed from 2.2 MeV up to 6.1 MeV in $^{206}\mathrm{Pb}$, whereas they are clustered between \ensuremath{\sim}3.0 and 3.7 MeV in $^{114}\mathrm{Sn}$. New spectroscopic information gained for ${J}^{\ensuremath{\pi}}$\ensuremath{\ge}6 levels or structures in $^{206}\mathrm{Pb}$ and $^{114}\mathrm{Sn}$ is discussed together with that of previous studies, especially the (\ensuremath{\alpha}${,}^{6}$He) results at high incident energy. Such comparisons show that configuration mixing is larger than predicted for the higher-energy transitions in $^{206}\mathrm{Pb}$. No significant concentration of valence plus deep hole states could be found in $^{206}\mathrm{Pb}$, whereas the previously known one valence plus one deep bump in $^{114}\mathrm{Sn}$ exhibits a maximum at \ensuremath{\sim}7.3 MeV here mainly attributed to the state in agreement with the prediction of the quasiparticle phonon model.