  We present confirmation of the planetary nature of PH-2b, as well as the
first mass estimates for the two planets in the Kepler-103 system. PH-2b and
Kepler-103c are both long-period and transiting, a sparsely-populated category
of exoplanet. We use {\it Kepler} light-curve data to estimate a radius, and
then use HARPS-N radial velocities to determine the semi-amplitude of the
stellar reflex motion and, hence, the planet mass. For PH-2b we recover a
3.5-$\sigma$ mass estimate of $M_p = 109^{+30}_{-32}$ M$_\oplus$ and a radius
of $R_p = 9.49\pm0.16$ R$_\oplus$. This means that PH-2b has a Saturn-like bulk
density and is the only planet of this type with an orbital period $P > 200$
days that orbits a single star. We find that Kepler-103b has a mass of
$M_{\text{p,b}} = 11.7^{+4.31}_{-4.72}$ M$_{\oplus}$ and Kepler-103c has a mass
of $M_{\text{p,c}} = 58.5^{+11.2}_{-11.4}$ M$_{\oplus}$. These are 2.5$\sigma$
and 5$\sigma$ results, respectively. With radii of $R_{\text{p,b}} =
3.49^{+0.06}_{-0.05}$ R$_\oplus$, and $R_{\text{p,c}} = 5.45^{+0.18}_{-0.17}$
R$_\oplus$, these results suggest that Kepler-103b has a Neptune-like density,
while Kepler-103c is one of the highest density planets with a period $P > 100$
days. By providing high-precision estimates for the masses of the long-period,
intermediate-mass planets PH-2b and Kepler-103c, we increase the sample of
long-period planets with known masses and radii, which will improve our
understanding of the mass-radius relation across the full range of exoplanet
masses and radii.
